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Электронный компонент: TA16S2FAA

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TA16-Type 2.5 Gbits/s Transponder with
16-Channel 155 Mbits/s Multiplexer/Demultiplexer
Data Sheet
March 2001
The TA16-Type transponders integrate up to 15 discrete ICs
and optical components, including a 2.5 Gbits/s optical trans-
mitter and receiver pair, all in a single, compact package.
Features
s
2.5 Gbits/s optical transmitter and receiver with
16-channel 155 Mbits/s multiplexer/demultiplexer
s
Available with 1.31 m Fabry-Perot laser transmit-
ter and PIN receiver for intraoffice applications,
and 1.31 m or 1.55 m DFB laser transmitters
and PIN or APD receiver for short-haul to long-haul
applications
s
Pigtailed low-profile package
s
Differential LVPECL data interface
s
Operating case temperature range: 0 C to 65 C
s
Automatic transmitter optical power control
s
Laser bias monitor output
s
Optical transmitter disable input
s
SONET frame-detect enable
s
Loss of signal, loss of sync, loss of framing alarms
s
Diagnostic loopback capability
s
Line loopback operation
Applications
s
Telecommunications:
-- Inter- and intraoffice SONET/SDH
-- Subscriber loop
-- Metropolitan area networks
s
High-speed data communications
Description
The TA16 transponder performs the parallel-to-serial-
to-optical transport and optical transport-to-serial-to-
parallel function of the SONET/SDH protocol. The
TA16 transmitter performs the bit serialization and
optical transmission of SONET/SDH OC-48/STM-16
data that has been formatted into standard SONET/
SDH compliant, 16-bit parallel format. The TA16
receiver performs the optical-to-electrical conversion
function and is then able to detect frame and byte
boundaries and demultiplex the serial data into 16-bit
parallel OC-48/STM-16 format.
Note: The TA16 transponder does not perform byte-
level multiplexing or interleaving.
Figure 1 shows a simplified block diagram of the
TA16-type transponder. This device is a bidirectional
module designed to provide a SONET or SDH com-
pliant electro-optical interface between the SONET/
SDH photonic physical layer and the electrical sec-
tion layer. The module contains a 2.5 Gbits/s optical
transmitter and a 2.5 Gbits/s optical receiver in the
same physical package along with the electronics
necessary to multiplex and demultiplex sixteen
155 Mbits/s electrical channels. Clock synthesis and
clock recovery circuits are also included within the
module.
In the transmit direction, the transponder module
multiplexes sixteen 155 Mbits/s LVPECL electrical
data signals into an optical signal at 2488.32 Mbits/s
for launching into optical fiber. An internal 2.488 GHz
reference oscillator is phase-locked to an external
155 MHz data timing reference.
2
Table of Contents
Agere Systems Inc.
Contents
Page
Tables
Page
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Features .................................................................... 1
Applications ............................................................... 1
Description ................................................................ 1
Absolute Maximum Ratings ....................................... 3
Pin Information .......................................................... 5
Pin Descriptions ........................................................ 6
Functional Description ............................................ 12
Receiver ............................................................. 12
Transmitter ......................................................... 12
Loopback Modes ................................................ 13
Transponder Interfacing ...................................... 13
Optical Characteristics ............................................ 14
Electrical Characteristics ......................................... 15
Timing Characteristics ............................................ 17
Transmitter Data Input Timing ............................ 17
Input Timing Mode 1 .......................................... 18
Input Timing Mode 2 .......................................... 19
Forward Clocking ............................................... 20
PC
LK
-to-PIC
LK
Timing ......................................... 21
PHERR/PHINIT ................................................... 22
Receiver Framing ............................................... 24
Qualification and Reliability ..................................... 26
Laser Safety Information ........................................ 26
Class 1 Laser Product ......................................... 26
Electromagnetic Emissions and Immunity .......... 26
Outline Diagram ...................................................... 27
Ordering Information ............................................... 28
Related Product Information .................................... 28
Table 1. TA16-Type Transponder Pinout .................. 6
Table 2. TA16-Type Transponder Input
Pin Descriptions ......................................... 10
Table 3. TA16-Type Transponder Output
Pin Descriptions ......................................... 11
Table 4. OC48/STM-16 Transmitter Optical
Characteristics ........................................... 14
Table 5. OC48/STM-16 Receiver Optical
Characteristics ........................................... 14
Table 6. Transmitter Electrical I/O Characteristics .. 15
Table 7. Receiver Electrical I/O Characteristics ...... 16
Table 8. Power Supply Characteristics ................... 16
Table 9. Transmitter ac Timing Characteristics ....... 23
Table 10. Receiver ac Timing Characteristics ......... 23
Table 11. Ordering Information ................................ 28
Table 12. Related Product Information .................... 28
Figures
Page
Figure 1. TA16-Type Transponder Block Diagram .... 4
Figure 2. TA16-Type Transponder Pinout ................. 5
Figure 3. Transponder Interfacing............................ 13
Figure 4. Block Diagram Timing Mode 1.................. 18
Figure 5. Block Diagram Timing Mode 2.................. 19
Figure 6. Forward Clocking of TA16 Transmitter.....20
Figure 7. PC
LK
-to-PIC
LK
Timing...............................21
Figure 8. PHERR/PHINIT Timing.............................22
Figure 9. ac Input Timing .........................................22
Figure 10. Receiver Output Timing Diagram ...........23
Figure 11. Frame and Byte Detection ......................24
Figure 12. OOF Timing (FRAMEN = High) ..............24
Figure 13. FRAMEN Timing .....................................25
Figure 14. Interfacing to TxR
EF
C
LK
Input................. 25
3
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Description
(continued)
The optical transmitter is available with either a 1.31 m
Fabry-Perot laser for short-reach applications or
1.31 m and 1.55 m DFB lasers for intermediate- to
long-reach applications. The optical output signal is
SONET and ITU compliant for OC-48/STM-16 applica-
tions as shown in Table 4, Optical Characteristics.
In the receive direction, the transponder module
receives a 2488.32 Mbits/s optical signal and converts
it to an electrical signal, extracts a clock signal, and
then demultiplexes the data into sixteen 155 Mbits/s
differential LVPECL data signals. The optical receiver is
available with either a PIN photodetector or with an
APD photodetector. The receiver operates over the
wavelength range of 1.1 m to 1.6 m and is fully com-
pliant to SONET/SDH OC-48/STM-16 physical layer
specifications as shown in Table 5, Optical Characteris-
tics.
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect reliability.
1. Human body model.
Parameter
Symbol
Min
Max
Unit
Operating Case Temperature Range
T
C
0
75
C
Storage Case Temperature Range
T
S
40
85
C
Supply Voltage
--
0.5
5.5
V
Voltage on Any LVPECL Pin
--
0
V
CC
--
High-speed LVPECL Output Source Current
--
--
50
mA
Static Discharge Voltage
1
ESD
--
500
V
Relative Humidity (noncondensing)
RH
--
85
%
Receiver Optical Input Power--Biased:
APD
PIN
P
IN
P
IN
--
--
0
8
dBm
dBm
Minimum Fiber Bend Radius
--
1.25 (31.8)
--
in. (mm)
4
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Block Diagram
1-1011(F).e
Figure 1. TA16-Type Transponder Block Diagram
OC-48/STM-16
OPTICAL TRANSMITTER
D
CK
D
OC-48/STM-16
OPTICAL RECEIVER
W/CLOCK RECOVERY
16:1 PARALLEL
TIMING
CLOCK DIVIDER
FRAME/BYTE
TIMING
1:16 SERIAL
MU
X
MU
X
TXDIS
MU
X
GENERATION
TO SERIAL
AND
PHASE DETECT
DETECT
GEN
TO PARALLEL
MU
X
LSRBIAS
LSR ALRM
LPM
TXD[0:15]P
TXD[0:15]N
PICLKP/N
PHINIT
PHERR
PCLKP/N
TXREFCLKP/N
LLOOP
DLOOP
OOF
SEARCH
FP
POCLKP/N
RXQ[0:15]P
RXQ[0:15]N
LOS
16
16
2
2
2
2
16
16
FRAMEN
LOCKDET
RESET
IPDMON
5
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Pin Information
1-1014(F).r2
Figure 2. TA16-Type Transponder Pinout
RXQ13N
RXQ13P
RXQ15N
RXQ15P
RXDGND
NC
NC
NC
NC
POCLKN
POCLKP
RX3.3A
RXAGND
RXAGND
SEARCH
RX3.3D
RX3.3D
RXDGND
OOF
RXDGND
LOS
LLOOP
PHERR
NC
TXDIS
PHINIT
NC
TX3.3A
TX3.3D
TXAGND
TXDGND
PCLKN
PCLKP
TXDGND
TXD00N
TXD00P
TXDGND
TXD02N
TXD02P
TXD04N
TXD04P
TXDGND
TXD06N
TXD06P
TXD08N
TXD08P
TXDGND
TXD10N
TXD10P
TXD12N
TXD12P
TXDGND
TXD14N
TXD14P
TXREFCLKN
TXDGND
RESET
FGND
RXDGND
RXQ12N
RXQ12P
RXQ14N
RXQ14P
RXDGND
NC
NC
NC
RXDGND
RXAGND
RXAGND
RX3.3A
RXAGND
RXAGND
NC
RX3.3D
FP
NC
DLOOP
NC
LSRBIAS
LSRALM
LPM
TXAGND
TX3.3A
TX3.3A
TXAGND
TX3.3D
TX3.3D
TXDGND
LOCKDET
PICLKN
PICLKP
TXDGND
TXD01N
TXD01P
TXD03N
TXD03P
TXDGND
TXD05N
TXD05P
TXD07P
TXDGND
TXD09N
TXD09P
TXD11N
TXD11P
TXDGND
TXD13N
TXD13P
TXD15N
TXD15P
TXDGND
IPDMON
FGND
RXDGND
140
60
130
50
120
40
110
30
100
20
90
10
1
81
TX
TXREFCLKP
TXD07N
FRAMEN
RX3.3D
RXDGND
RXQ05N
RXQ05P
RXQ07N
RXQ07P
RXDGND
RXQ09N
RXQ09P
RXQ11N
RXQ11P
RXDGND
RXQ04N
RXQ04P
RXQ06N
RXQ06P
RXDGND
RXQ08N
RXQ08P
RXQ10N
RXQ10P
RXDGND
150
70
NC
NC
NC
NC
RXDGND
RXQ01N
RXQ01P
RXQ03N
RXQ03P
FGND
NC
NC
NC
NC
RXDGND
RXQ00N
RXQ00P
RXQ02N
RXQ02P
FGND
160
80
RX
TOP VIEW
6
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Pin Descriptions
Table 1. TA16-Type Transponder Pinout
Pin #
Pin Name
I/O
Logic
Description
01
FGND
I
Supply
Frame Ground
1
02
IPDMON
O
Analog
Receiver Photodiode Current Monitor
03
TxDGND
I
Supply
Transmitter Digital Ground
04
TxD15P
I
LVPECL
Transmitter 155 Mbits/s MSB Data Input
05
TxD15N
I
LVPECL
Transmitter 155 Mbits/s MSB Data Input
06
TxD13P
I
LVPECL
Transmitter 155 Mbits/s Data Input
07
TxD13N
I
LVPECL
Transmitter 155 Mbits/s Data Input
08
TxDGND
I
Supply
Transmitter Digital Ground
09
TxD11P
I
LVPECL
Transmitter 155 Mbits/s Data Input
10
TxD11N
I
LVPECL
Transmitter 155 Mbits/s Data Input
11
TxD09P
I
LVPECL
Transmitter 155 Mbits/s Data Input
12
TxD09N
I
LVPECL
Transmitter 155 Mbits/s Data Input
13
TxDGND
I
Supply
Transmitter Digital Ground
14
TxD07P
I
LVPECL
Transmitter 155 Mbits/s Data Input
15
TxD07N
I
LVPECL
Transmitter 155 Mbits/s Data Input
16
TxD05P
I
LVPECL
Transmitter 155 Mbits/s Data Input
17
TxD05N
I
LVPECL
Transmitter 155 Mbits/s Data Input
18
TxDGND
I
Supply
Transmitter Digital Ground
19
TxD03P
I
LVPECL
Transmitter 155 Mbits/s Data Input
20
TxD03N
I
LVPECL
Transmitter 155 Mbits/s Data Input
21
TxD01P
I
LVPECL
Transmitter 155 Mbits/s Data Input
22
TxD01N
I
LVPECL
Transmitter 155 Mbits/s Data Input
23
TxDGND
I
Supply
Transmitter Digital Ground
24
PIC
LK
P
I
LVPECL
Byte-Aligned Parallel Input Clock at 155 MHz
25
PIC
LK
N
I
LVPECL
Byte-Aligned Parallel Input Clock ar 155 MHz
26
LOCKDET
O
LVTTL
Lock Detect
27
TxDGND
I
Supply
Transmitter Digital Ground
28
Tx3.3D
I
Supply
Transmitter 3.3 V Digital Supply
29
Tx3.3D
I
Supply
Transmitter 3.3 V Digital Supply
30
TxAGND
I
Supply
Transmitter Analog Ground
31
Tx3.3A
I
Supply
Transmitter 3.3 V Analog Supply
32
Tx3.3A
I
Supply
Transmitter 3.3 V Analog Supply
33
TxAGND
I
Supply
Transmitter Analog Ground
34
LPM
O
Analog
Laser Power Monitor
35
LSRALRM
O
Analog
Laser Degrade Alarm
36
LSRBIAS
O
Analog
Transmitter Laser Bias Output
37
NC
--
--
No User Connection Permitted
38
D
LOOP
I
LVTTL
Diagnostic Loopback
39
NC
--
--
No User Connection Permitted
40
FP
O
LVPECL
Frame Pulse
41
FRAMEN
I
LVTTL
Frame Enable
42
RxDGND
I
Supply
Receiver Digital Ground
1. Frame ground is connected to the housing and is isolated from all circuit grounds (TxDGND, TxAGND, RxDGND, RxAGND).
7
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
43
Rx3.3D
I
Supply
Receiver 3.3 V Digital Supply
44
Rx3.3D
I
Supply
Receiver 3.3 V Digital Supply
45
NC
--
--
No User Connection Permitted
46
RxAGND
I
Supply
Receiver Analog Ground
47
RxAGND
I
Supply
Receiver Analog Ground
48
Rx3.3A
I
Supply
Receiver 3.3 V Analog Supply
49
RxAGND
I
Supply
Receiver Analog Ground
50
RxAGND
I
Supply
Receiver Analog Ground
51
RxDGND
I
Supply
Receiver Digital Ground
52
NC
--
--
No User Connection Permitted
53
NC
--
--
No User Connection Permitted
54
NC
--
--
No User Connection Permitted
55
RxDGND
I
Supply
Receiver Digital Ground
56
RxQ14P
O
LVPECL
Receiver 155 Mbits/s Data Output
57
RxQ14N
O
LVPECL
Receiver 155 Mbits/s Data Output
58
RxQ12P
O
LVPECL
Receiver 155 Mbits/s Data Output
59
RxQ12N
O
LVPECL
Receiver 155 Mbits/s Data Output
60
RxDGND
I
Supply
Receiver Digital Ground
61
RxQ10P
O
LVPECL
Receiver 155 Mbits/s Data Output
62
RxQ10N
O
LVPECL
Receiver 155 Mbits/s Data Output
63
RxQ08P
O
LVPECL
Receiver 155 Mbits/s Data Output
64
RxQ08N
O
LVPECL
Receiver 155 Mbits/s Data Output
65
RxDGND
I
Supply
Receiver Digital Ground
66
RxQ06P
O
LVPECL
Receiver 155 Mbits/s Data Output
67
RxQ06N
O
LVPECL
Receiver 155 Mbits/s Data Output
68
RxQ04P
O
LVPECL
Receiver 155 Mbits/s Data Output
69
RxQ04N
O
LVPECL
Receiver 155 Mbits/s Data Output
70
RxDGND
I
Supply
Receiver Digital Ground
71
RxQ02P
O
LVPECL
Receiver 155 Mbits/s Data Output
72
RxQ02N
O
LVPECL
Receiver 155 Mbits/s Data Output
73
RxQ00P
O
LVPECL
Receiver 155 Mbits/s LSB Data Output
74
RxQ00N
O
LVPECL
Receiver 155 Mbits/s LSB Data Output
75
RxDGND
I
Supply
Receiver Digital Ground
76
NC
--
--
No User Connection Permitted
77
NC
--
--
No User Connection Permitted
78
NC
--
--
No User Connection Permitted
79
NC
--
--
No User Connection Permitted
80
FGND
I
Supply
Frame Ground
1
81
FGND
I
Supply
Frame Ground
1
82
RESET
I
LVTTL
Master Reset
83
TxDGND
I
Supply
Transmitter Digital Ground
84
TxR
EF
C
LK
P
I
LVPECL
Transmitter 155 Mbits/s Reference Clock Input
85
TxR
EF
C
LK
N
I
LVPECL
Transmitter 155 Mbits/s Reference Clock Input
Pin #
Pin Name
I/O
Logic
Description
Pin Descriptions
(continued)
Table 1. TA16-Type Transponder Pinout (continued)
1. Frame ground is connected to the housing and is isolated from all circuit grounds (TxDGND, TxAGND, RxDGND, RxAGND).
8
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
86
TxD14P
I
LVPECL
Transmitter 155 Mbits/s Data Input
87
TxD14N
I
LVPECL
Transmitter 155 Mbits/s Data Input
88
TxDGND
I
SUPPLY
Transmitter Digital Ground
89
TxD12P
I
LVPECL
Transmitter 155 Mbits/s Data Input
90
TxD12N
I
LVPECL
Transmitter 155 Mbits/s Data Input
91
TxD10P
I
LVPECL
Transmitter 155 Mbits/s Data Input
92
TxD10N
I
LVPECL
Transmitter 155 Mbits/s Data Input
93
TxDGND
I
Supply
Transmitter Digital Ground
94
TxD08P
I
LVPECL
Transmitter 155 Mbits/s Data Input
95
TxD08N
I
LVPECL
Transmitter 155 Mbits/s Data Input
96
TxD06P
I
LVPECL
Transmitter 155 Mbits/s Data Input
97
TxD06N
I
LVPECL
Transmitter 155 Mbits/s Data Input
98
TxDGND
I
Supply
Transmitter Digital Ground
99
TxD04P
I
LVPECL
Transmitter 155 Mbits/s Data Input
100
TxD04N
I
LVPECL
Transmitter 155 Mbits/s Data Input
101
TxD02P
I
LVPECL
Transmitter 155 Mbits/s Data Input
102
TxD02N
I
LVPECL
Transmitter 155 Mbits/s Data Input
103
TxDGND
I
Supply
Transmitter Digital Ground
104
TxD00P
I
LVPECL
Transmitter 155 Mbits/s LSB Data Input
105
TxD00N
I
LVPECL
Transmitter 155 Mbits/s LSB Data Input
106
TxDGND
I
Supply
Transmitter Digital Ground
107
PC
LK
P
O
LVPECL
Transmitter Parallel Reference Clock Output
108
PC
LK
N
O
LVPECL
Transmitter Parallel Reference Clock Output
109
TxDGND
I
Supply
Transmitter Digital Ground
110
TxAGND
I
Supply
Transmitter Analog Ground
111
Tx3.3D
I
Supply
Transmitter Digital 3.3 V Supply
112
Tx3.3A
I
Supply
Transmitter Analog 3.3 V Supply
113
NC
--
--
No User Connection Permitted
114
PHINIT
I
LVPECL
Phase Initialization
115
T
X
DIS
I
TTL
Transmitter Disable
116
NC
--
--
No User Connection Permitted
117
PHERR
O
LVPECL
Phase Error
118
L
LOOP
I
LVTTL
Line Loopback (active-low)
119
LOS
O
LVTTL
Loss of Signal
120
RxDGND
I
Supply
Receiver Digital Ground
121
OOF
I
LVTTL
Out of Frame (enable frame detection)
122
RxDGND
I
Supply
Receiver Digital Ground
123
Rx3.3D
I
Supply
Receiver Digital 3.3 V Supply
124
Rx3.3D
I
Supply
Receiver Digital 3.3 V Supply
125
SEARCH
O
LVTTL
Frame Search Output
126
RxAGND
I
Supply
Receiver Analog Ground
127
RxAGND
I
Supply
Receiver Analog Ground
128
Rx3.3A
I
Supply
Receiver Analog 3.3 V Supply
Pin #
Pin Name
I/O
Logic
Description
Pin Descriptions
(continued)
Table 1. TA16-Type Transponder Pinout (continued)
1. Frame ground is connected to the housing and is isolated from all circuit grounds (TxDGND, TxAGND, RxDGND, RxAGND).
9
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
1. Frame ground is connected to the housing and is isolated from all circuit grounds (TxDGND, TxAGND, RxDGND, RxAGND).
129
POC
LK
P
O
LVPECL
Byte-Aligned Parallel Output Clock at 155 MHz
130
POC
LK
N
O
LVPECL
Byte-Aligned Parallel Output Clock at 155 MHz
131
NC
--
--
No User Connection Permitted
132
NC
--
--
No User Connection Permitted
133
NC
--
--
No User Connection Permitted
134
NC
--
--
No User Connection Permitted
135
RxDGND
I
Supply
Receiver Digital Ground
136
RxQ15P
O
LVPECL
Receiver MSB 155 Mbits/s Data Output
137
RxQ15N
O
LVPECL
Receiver MSB 155 Mbits/s Data Output
138
RxQ13P
O
LVPECL
Receiver 155 Mbits/s Data Output
139
RxQ13N
O
LVPECL
Receiver 155 Mbits/s Data Output
140
RxDGND
I
Supply
Receiver Digital Ground
141
RxQ11P
O
LVPECL
Receiver 155 Mbits/s Data Output
142
RxQ11N
O
LVPECL
Receiver 155 Mbits/s Data Output
143
RxQ09P
O
LVPECL
Receiver 155 Mbits/s Data Output
144
RxQ09N
O
LVPECL
Receiver 155 Mbits/s Data Output
145
RxDGND
I
Supply
Receiver Digital Ground
146
RxQ07P
O
LVPECL
Receiver 155 Mbits/s Data Output
147
RxQ07N
O
LVPECL
Receiver 155 Mbits/s Data Output
148
RxQ05P
O
LVPECL
Receiver 155 Mbits/s Data Output
149
RxQ05N
O
LVPECL
Receiver 155 Mbits/s Data Output
150
RxDGND
I
Supply
Receiver Digital Ground
151
RxQ03P
O
LVPECL
Receiver 155 Mbits/s Data Output
152
RxQ03N
O
LVPECL
Receiver 155 Mbits/s Data Output
153
RxQ01P
O
LVPECL
Receiver 155 Mbits/s Data Output
154
RxQ01N
O
LVPECL
Receiver 155 Mbits/s Data Output
155
RxDGND
I
Supply
Receiver Digital Ground
156
NC
--
--
No User Connection Permitted
157
NC
--
--
No User Connection Permitted
158
NC
--
--
No User Connection Permitted
159
NC
--
--
No User Connection Permitted
160
FGND
I
Supply
Frame Ground
1
Pin #
Pin Name
I/O
Logic
Description
Pin Descriptions
(continued)
Table 1. TA16-Type Transponder Pinout (continued)
10
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Pin Descriptions
(continued)
Table 2. TA16-Type Transponder Input Pin Descriptions
Pin Name
Pin Description
TxD[0:15]P
TxD[0:15]N
16-bit Differential LVPECL Parallel Input Data Bus. TxD15P/N is the most signifi-
cant bit of the input word and is the first bit serialized. TxD00P/N is the least signifi-
cant bit of the input word and is the last bit serialized. TxD[0:15]P/N is sampled on
the rising edge of PIC
LK
.
PIC
LK
P
PIC
LK
N
Differential LVPECL Parallel Input Clock. A 155 MHz nominally 50% duty cycle
input clock to which TxD[0:15]P/N is aligned. The rising edge of PIC
LK
transfers the
data on the 16 TxD inputs into the holding register of the parallel-to-serial converter.
TxR
EF
C
LK
P
TxR
EF
C
LK
N
Differential LVPECL Low Jitter 155.520 MHz Input Reference Clock. This input is
used as the reference for the internal clock frequency synthesizer which generates
the 2.5 GHz bit rate clock used to shift data out of the parallel-to-serial converter and
also for the byte-rate clock, which transfers the 16-bit parallel input data from the
input holding register into the parallel-to-serial shift register. Input is internally termi-
nated and biased. See discussion on interfacing, page 13.
TxDIS
Transmitter Disable Input. A logic HIGH on this input pin shuts off the transmitter's
laser so that there is no optical output.
D
LOOP
Diagnostic Loopback Enable (LVTTL). When the D
LOOP
input is low, the
2.5 Gbits/s serial data stream from the parallel-to-serial converter is looped back
internally to the serial-to-parallel converter along with an internally generated bit syn-
chronous serial clock. The received serial data path from the optical receiver is dis-
abled.
L
LOOP
Line Loopback Enable (LVTTL). When L
LOOP
is low, the 2.5 Gbits/s serial data and
recovered clock from the optical receiver are looped directly back to the optical trans-
mitter. The multiplexed serial data from the parallel-to-serial converter is ignored.
PHINIT
Phase Initialization (LVPECL). A rising edge on this input will realign the internal
timing associated with clocking data into and out of the internal FIFO. For a detailed
explanation, see the section on Transmitter Data Input Timing on page 17.
FRAMEN
Frame Enable Input (LVTTL). Enables the frame detection circuitry to detect A1
A2 byte alignment and to lock to a word boundary. The TA16 transponder will contin-
ually perform frame acquisition as long as FRAMEN is held high. When this input is
low, the frame-detection circuitry is disabled. Frame-detection process is initiated by
rising edge of out-of-frame pulse.
OOF
Out of Frame (LVTTL). This input indicator is typically generated by external
SONET/SDH overhead monitor circuitry in response to a state in which the frame
boundaries of the received SONET/SDH signal are unknown, i.e., after system reset
or loss of synchronization. The rising edge of the OOF input initiates the frame detec-
tion function if FRAMEN is high. The FP output goes high when the frame boundary
is detected in the incoming serial data stream from the optical receiver.
RESET
Master Reset (LVTTL). Reset input for the multiplexer/demultiplexer. A low on this
input clears all buffers and registers. During reset, POC
LK
and PC
LK
do not toggle.
11
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Pin Descriptions
(continued)
Table 3. TA16-Type Transponder Output Pin Descriptions
Pin Name
Pin Description
RxQ[0:15]P
RxQ[0:15]N
16-bit Differential LVPECL Parallel Output Data Bus. RxQ[0:15] is the
155 Mbyte/s 16-bit output word. RxQ15P/N is the most significant bit of the received
word and is the first bit serialized. RxQ00P/N is the least significant bit of the
received word and is the last bit serialized. RxQ[0:15]P/N is updated on the falling
edge of POC
Lk
.
POC
LK
P
POC
LK
N
Differential LVPECL Parallel Output Clock. A 155 MHz nominally 50% duty cycle,
byte rate output clock that is aligned to the RxQ[0:15] byte serial output data.
RxQ[0:15] and FP are updated on the falling edge of POC
LK
.
FP
Frame Pulse (LVPECL). Indicates frame boundaries in the received serial data
stream. If framing pattern detection is enabled (FRAMEN high and OOF), FP pulses
high for one POC
LK
cycle when a 32-bit sequence matching the framing pattern is
detected in the received serial data. FP is updated on the falling edge of POC
LK
.
SEARCH
A1 A2 Frame Search Output (LVTTL). A high on this output pin indicates that the
frame detection circuit is active and is searching for a new A1 A2 byte alignment.
This output will be high during the entire A1 A2 frame search. Once a new alignment
is found, this signal will remain high for a minimum of one 155 MHz clock period
beyond the third A2 byte before it will be set low.
LOS
Loss of Signal (LVTTL). A low on this output indicates a loss of lock by the clock
recovery circuit in the optical receiver.
LSRBIAS
Laser Bias (Analog). Provides an indication of the health of the laser in the trans-
mitter. This output changes at the rate of 20 mV/mA of bias current. If this output
voltage reaches 1.4 V (70 mA of bias), the automatic power control circuit is strug-
gling to maintain output power. This may indicate that the transmitter has reached an
end-of-life condition.
LSRALRM
Laser Degrade Alarm (5 V CMOS). A logic low on this output indicates that the
transmitter's automatic power control circuits are unable to maintain the nominal out-
put power. This output becomes active when the optical output power degrades 2 dB
below the nominal operating power.
LPM
Laser Power Monitor (Analog). Provides an indication of the output power level
from the transmitter laser. This output is set at 500 mV for the nominal transmitter
optical output power. If the optical power decreases by 3 dB, this output will drop to
approximately 250 mV, and if the output power should increase by 3 dB, this output
will increase to 1000 mV.
PC
LK
P/N
Parallel Byte Clock (Differential LVPECL). A byte-rate reference clock generated
by dividing the internal 2.488 GHz serial bit clock by 16. This output is normally used
to synchronize byte-wide transfers from upstream logic into the TA16 transponder.
See timing discussion for additional details, page 17.
PHERR
Phase Error Signal (Single-Ended LVPECL). This signal pulses high during each
PC
LK
cycle for which there is potential setup/hold timing violations between the inter-
nal byte clock and the PIC
LK
timing domains. PHERR is updated on the falling edge
of the PIC
LK
output. For a detailed explanation, see the section on Transmitter Data
Input Timing on page 17.
IDPMON
Receiver Photodiode Current Monitor (Analog). This output provides a current
output that is a mirror of the photocurrent generated by the optical receiver's photo-
diode (APD or PIN).
LOCKDET
Lock Detect (LVTTL). This output goes low after the transmit side PLL has locked to
the clock signal provided at the T
X
R
EF
C
LK
input pins. LOCKDET is an asynchronous
output.
12
12
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Functional Description
Receiver
The optical receiver in the TA16-type transponder is
optimized for the particular SDH/SONET application
segment in which it was designed to operate and will
have either an APD or PIN photodetector. The detected
serial data output of the optical receiver is connected to
a clock and data recovery circuit (CDR), which extracts
a 2488.32 MHz clock signal. This recovered serial bit
clock signal and a retimed serial data signal are pre-
sented to the 16-bit serial-to-parallel converter and to
the frame and byte detection logic.
The serial-to-parallel converter consists of three 16-bit
registers. The first is a serial-in parallel-out shift regis-
ter, which performs serial-to-parallel conversion. The
second is an internal 16-bit holding register, which
transfers data from the serial-to-parallel register on
byte boundaries as determined by the frame and byte
detection logic. On the falling edge of the free-running
POC
LK
signal, the data in the holding register is trans-
ferred to the output holding register where it becomes
available as RxQ[0:15].
The frame and byte boundary detection circuitry
searches the incoming data for three consecutive A1
bytes followed immediately by an A2 byte. Framing pat-
tern detection is enabled and disabled by the FRAMEN
input. The frame detection process is started by a ris-
ing edge on OOF while FRAMEN is active (FRAMEN=
high). It is disabled when a framing pattern is detected.
When framing pattern detection is enabled (FRAMEN =
high), the framing pattern is used to locate byte and
frame boundaries in the incoming serial data stream
from the CDR circuits. During this time, the parallel out-
put data bus (RxQ[0:15]) will not contain valid data.
The timing generator circuitry takes the located byte
boundary and uses it to block the incoming serial data
stream into bytes for output on the parallel output data
bus (RxQ[0:15]). The frame boundary is reported on
the framing pulse (FP) output when any 32-bit pattern
matching the framing pattern is detected in the incom-
ing serial data stream. When framing detection is dis-
abled (FRAMEN = low), the byte boundary is fixed at
the location found when frame detection was previously
enabled.
Transmitter
The optical transmitter in the TA16-type transponder is
optimized for the particular SDH/SONET segment in
which it is designed to operate. The transmitter will
have either a Fabry-Perot or a DFB laser as the optical
element and can operate at either 1310 nm or
1550 nm. The transmitter is driven by a serial data
stream developed in the parallel-to-serial conversion
logic and by a 2488.32 MHz serial bit clock signal syn-
thesized from the 155.52 MHz TxR
EF
C
LK
input.
The parallel-to-serial converter block shown in Figure 1
is comprised of two byte-wide registers. The first regis-
ter latches the 16 bits of parallel input data (TxD[0:15])
on the rising edge of PIC
LK
. The second register is a
16-bit parallel-load serial-out shift register that is
loaded from the input register. An internally generated
byte clock, which is phase aligned to the 2488.32 MHz
serial transmit clock, activates the data transfer
between the input register and the parallel-to-serial
register.
The clock divider and phase detect circuitry shown in
Figure 1 generates internal reference clocks and timing
functions for the transmitter. Therefore, it is important
that the TxR
EF
C
LK
input is generated from a precise
and stable source. To prevent internal timing signals
from producing jitter in the transmitted serial data that
exceeds the SDH/SONET jitter generation require-
ments of 0.01 UI, it is required that the TxR
EF
C
LK
input
be generated from a crystal oscillator or other source
having a frequency accuracy better than 20 ppm. In
order to meet the SDH/SONET requirement, the refer-
ence clock jitter must be guaranteed to be less than
1 ps rms over the 12 kHz to 20 MHz bandwidth. When
used in SONET network applications, this input clock
must be derived from a source that is synchronized to
the primary reference clock (stratum 1 clock).
The timing generation circuitry provides two separate
functions. It develops a byte rate clock that is synchro-
nized to the 2488.32 MHz transmit serial clock, and it
provides a mechanism for aligning the phase between
the incoming byte clock (PIC
LK
) and the clock which
loads the parallel data from the input register into the
parallel-to-serial shift register. The PC
LK
output is a
byte rate (155 MHz) version of the serial transmit clock
and is intended for use by upstream multiplexing and
overhead processing circuits. Using PC
LK
for upstream
circuits will ensure a stable frequency and phase rela-
tionship between the parallel data coming into the
transmitter and the subsequent parallel-to-serial timing
functions. The timing generator also provides a feed-
back reference clock to the phase detector for use by
the transmit serial clock synthesizer (for additional dis-
cussions, see transmitter input options, page 17.)
13
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Functional Description
(continued)
Loopback Modes
The TA16 transponder is capable of operating in either
of two loopback modes: diagnostic loopback or line
loopback.
Line Loopback
When LLOOP is pulled low, the received serial data
stream and recovered 2488.32 MHz serial clock from
the optical receiver are connected directly to the serial
data and clock inputs of the optical transmitter. This
establishes a receive-to-transmit loopback at the serial
line rate.
Diagnostic Loopback
When DLOOP is pulled low, a loopback path is estab-
lished from the transmitter to the receiver. In this mode,
the serial data from the parallel-to-serial converter and
the transmit serial clock are looped back to the serial-
to-parallel converter and the frame and byte detect cir-
cuitry, respectively.
Transponder Interfacing
The TxD[0:15]P/N and PIC
LK
P/N inputs and the
RxQ[0:15]P/N, POC
LK
P/N, and PC
LK
P/N outputs are
high-speed (155 Mbits/s), LVPECL differential data and
clock signals. To maintain optimum signal fidelity, these
inputs and outputs must be connected to their termi-
nating devices via 50
controlled-impedance trans-
mission lines. The transmitter inputs (TxD[0:15]P/N,
TxR
EF
C
LK
P/N, and PIC
LK
P/N) must be terminated as
close as possible to the TA16 transponder connector
with a Thevenin equivalent impedance equal to 50
terminated to Vcc 2 V. The receiver outputs
(RxQ[0:15]P/N, POC
LK
P/N, and PC
LK
P/N) must be ter-
minated as close as possible to the device (IC) that
these signals interface to with a Thevenin equivalent
impedance equal to 50
terminated to Vcc 2 V.
Figure 3, below, shows one example of the proper ter-
minations. Other methods may be used, provided they
meet the requirements stated above.
TxR
EF
C
LK
P/N. The reference clock input is different
than the TxD and PIC
LK
inputs because it is internally
terminated, ac-coupled, and self-biased. Therefore, it
must be treated somewhat differently than the TxD and
PIC
LK
inputs. Figure 14 shows the proper method for
connecting the TxR
EF
C
LK
input.
1-1054(F)
Figure 3. Transponder Interfacing
TxD[0:15]P
130
80
80
130
3.3 V
130
80
80
130
3.3 V
SONET/SDH
RxLINE
TxLINE
50
IMPEDANCE
TA16-TYPE TRANSPONDER
TRANSMISSION LINES
50
IMPEDANCE
TRANSMISSION LINES
INTERFACE IC
CONNE
CT
OR
(LVPECL)
TxD[0:15]N
(LVPECL)
RxD[0:15]P
(LVPECL)
RxD[0:15]N
(LVPECL)
MUX
DEMUX
Tx
Rx
14
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Optical Characteristics
Minimum and maximum values specified over operating case temperature range at 50% duty cycle data signal.
Typical values are measured at room temperature unless otherwise noted.
Table 4. OC48/STM-16 Transmitter Optical Characteristics (Tc = 0 C to 65 C)
1. Output power definitions and measurements per ITU-T Recommendation G.957.
2. Full spectral width measured 20 dB down from the central wavelength peak under fully modulated conditions.
3. Ratio of the average output power in the dominant longitudinal mode to the power in the most significant side mode under fully modulated
conditions.
4. Ratio of logic 1 output power to logic 0 output power under fully modulated conditions.
5. GR-253-CORE, Synchronous Optical Network (SONET) Transport Systems: Common Generic Criteria.
6. ITU-T Recommendation G.957, Optical Interfaces for Equipment and Systems Relating to the Synchronous Digital Hierarchy.
Table 5. OC48/STM-16 Receiver Optical Characteristics (Tc = 0 C to 65 C)
1. At 1310 nm, 1 x 10
10
BER, 2
23
1 pseudorandom data input.
Parameter
Symbol
Min
Typ
Max
Unit
Average Output Power:
1
Intraoffice (F-P laser)
Short Haul (DFB laser)
Long Haul:
1.3 m DFB Laser
1.55 m DFB Laser
P
o
P
o
P
o
P
o
10
5
2
2
5
2
0
0
3
0
2
3
dBm
dBm
dBm
dBm
Operating Wavelength:
Intraoffice (F-P laser)
Short Haul (DFB laser)
Long Haul (1.3 m DFB laser)
Long Haul (1.55 m DFB laser)
1270
1270
1280
1500
--
--
--
--
1360
1360
1335
1580
nm
nm
nm
nm
Spectral Width:
Intraoffice (F-P laser)
Short Haul and Long Haul (DFB laser)
2
rms
20
--
--
--
--
4
1
nm
nm
Side-mode Suppression Ratio (DFB laser)
3
SSR
30
--
--
dB
Extinction Ratio
4
r
e
8.2
--
--
dB
Optical Rise and Fall Times
t
R
, t
F
--
--
200
ps
Eye Mask of Optical Output
5, 6
Compliant with GR-253 and ITU-T G.957
Jitter Generation
Compliant with GR-253 and ITU-T G.958
Parameter
Symbol
Min
Typ
Max
Unit
Average Receiver Sensitivity
1
:
PIN Receiver (intraoffice, short haul)
APD Receiver (long haul)
P
RMIN
P
RMIN
20
29
25
34
--
--
dBm
dBm
Maximum Optical Power:
PIN Receiver
APD Receiver (long reach)
P
RMAX
RMAX
1
6
--
--
--
--
dBm
dBm
Link Status Switching Threshold
Decreasing Light Input:
APD
PIN
LSTD
LSTD
--
--
TBD
TBD
--
--
dBm
dBm
Link Status Response Time
--
3
--
100
s
Optical Path Penalty (1310 nm/1550 nm)
--
--
--
1/2
dB
Receiver Reflectance
--
--
--
27
dB
Jitter Tolerance and Jitter Transfer
Compliant with GR-253 and ITU-T G.958
15
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Electrical Characteristics
Table 6. Transmitter Electrical I/O Characteristics (T
C
= 0 C to 65 C, V
CC
= 3.3 V 5%)
1. 20% to 80%.
2. Internally biased and ac-coupled. See Figure 13.
3. The transmitter is normally enabled and only requires an external voltage to disable.
4. Output conversion factor is 20 mV/mA of laser bias current.
5. Set at 500 mV at nominal output power; will track P
O
linearly (3 dB = 250 mV, +3 dB = 1000 mV).
6. Terminated into 220
to GND with 100
line-to-line.
Parameter
Symbol
Logic
Min
Typ
Max
Unit
Parallel Input Clock
PIC
LK
P/N
Diff.
LVPECL
153.90
155.52
157.00
MHz
Parallel Clock in Duty Cycle
--
--
40
--
60
%
Reference Clock
Frequency Tolerance
TxR
EF
C
LK
P/N
Diff.
LVPECL
20
--
20
ppm
Reference Clock Jitter
(in 12 KHz to 20 MHz band)
--
--
--
--
1
ps
rms
Reference Clock
Input Duty Cycle
--
--
45
--
55
%
Reference Clock Rise
and Fall Times
1
--
--
--
--
1.5
ns
Reference Clock Signal Levels:
2
Diff. Input Voltage Swing
Single-ended Input Voltage Swing
Differential Input Resistance
V
INDIFF
V
INSINGLE
R
DIFF
Diff.
LVPECL
300
150
80
--
--
100
1200
600
120
mV
mV
Input Data Signal Levels:
Input High, V
IH
Input Low, V
IL
Input Voltage Swing,
V
IN
TxD[0:15]P/N
Diff.
LVPECL
V
CC
1.2
V
CC
2.0
300
--
--
--
V
CC
0.3
V
CC
1.5
--
V
V
mV
Transmitter Disable Input
3
TxD
IS
TTL (5 V)
2.0
--
5.5
V
Transmitter Enable Input
3
TxE
N
TTL (5 V)
0
--
0.8
V
Laser Bias Voltage Output
4
LSRBIAS
Analog
0
200
1600
mV
Laser Power Monitor Output
5
LPM
Analog
35
500
1000
mV
Laser Degrade Alarm:
Output High, V
OH
Output Low, V
OL
LSRALM
5 V
CMOS
4.5
0
--
--
5.2
0.4
V
V
Phase Initialization:
Input High, V
IH
Input Low, V
IL
PHINIT
Single-
Ended
LVPECL
V
CC
1.0
V
CC
2.3
--
--
V
CC
0.57
V
CC
1.44
V
V
Phase Error
6
:
Output High, V
OH
Output Low, V
OL
PHERR
Single-
Ended
LVPECL
V
CC
1.2
V
CC
2.2
--
--
V
CC
0.65
V
CC
1.5
V
V
Line Loopback Enable:
Active-Low:
Input High, V
IH
Input Low, V
IL
L
LOOP
LVTTL
2.0
0
--
--
V
CC
+ 1.0
0.8
V
V
16
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Electrical Characteristics
(continued)
1. 20% to 80%.
2. Internally biased and ac-coupled. See Figure 13.
3. The transmitter is normally enabled and only requires an external voltage to disable.
4. Output conversion factor is 20 mV/mA of laser bias current.
5. Set at 500 mV at nominal output power; will track P
O
linearly (3 dB = 250 mV, +3 dB = 1000 mV).
6. Terminated into 220
to GND with 100
line-to-line.
Table 7. Receiver Electrical I/O Characteristics (Tc = 0 C to 65 C, Vcc = 3.3 V 5%)
1. Terminated into 330
to ground.
2. 20% to 80%, 330
to ground.
Table 8. Power Supply Characteristics (Tc = 0 C to 65 C)
1. Does not include output termination resistor current drain.
Table 6. Transmitter Electrical I/O Characteristics (T
C
= 0 C to 65 C, V
CC
= 3.3 V 5%) (continued)
Diagnostic Loopback Enable:
Active-Low:
Input High, V
IH
Input Low, V
IL
D
LOOP
LVTTL
2.0
0
--
--
V
CC
+ 1.0
0.8
V
V
Parallel Output Clock:
6
Output High, V
OH
Output Low, V
OL
S-E Output Voltage Swing,
V
SINGLE
Diff. Voltage Swing,
V
DIFF
PC
LK
P/N
Diff.
LVPECL
V
CC
1.15
V
CC
1.95
400
800
--
--
--
--
V
CC
0.6
V
CC
1.45
950
1900
V
V
mV
mV
Parameter
Symbol
Logic
Min
Typ
Max
Unit
Parallel Output Clock:
Output High, V
OH
Output Low, V
OL
POC
LK
P/N
Diff.
LVPECL
V
CC
1.3
V
CC
2.00
--
--
V
CC
0.7
V
CC
1.4
V
V
POC
Lk
Duty Cycle
--
--
40
--
60
%
Output Data Signal Levels
1
:
Output High, V
OH
Output Low, V
OL
RxQ[0:15]P/N
Diff.
LVPECL 2.275
1.490
--
--
2.420
1.680
V
V
RxQ[0:15] Rise/Fall Time
2
--
--
--
--
1.0
ns
Frame Pulse:
Output High, V
OH
Output Low, V
OL
FP
LVPECL
V
CC
1.3
V
CC
2.00
--
--
V
CC
0.7
V
CC
1.4
V
V
Loss-of-Signal Output:
Output High, V
OH
Output Low, V
OL
LOS
LVTTL
2.4
0
--
--
V
CC
0.4
V
V
Out-of-Frame Input:
Input High, V
IH
Input Low, V
IL
OOF
LVTTL
2.00
0.0
--
--
V
CC
+ 1.0
0.8
V
V
Frame Enable Input
F
RAM
E
N
LVTTL
2.00
0.0
--
--
V
CC
+ 1.0
0.8
V
V
Parameter
Symbol
Min
Typ
Max
Unit
Supply Voltage
V
CC
3.13
3.3
3.47
V
dc Power Supply Current Drain
1
I
CC
--
1800
2300
mA
Power Dissipation
P
DISS
--
6
--
W
17
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Timing Characteristics
Transmitter Data Input Timing
The TA16 transponder utilizes a unique FIFO to decou-
ple the internal and external (PIC
LK
) clocks. The FIFO
can be initialized, which allows the system designer to
have an infinite PC
LK
-to-PIC
LK
delay through this inter-
facing logic (ASIC or commercial chip set). The config-
uration of the FIFO is dependent upon the I/O pins,
which comprise the synch timing loop. This loop is
formed from PHERR to PHINIT and PC
LK
to PIC
LK
.
The FIFO can be thought of as a memory stack that
can be initialized by PHINT or LOCKDET. The PHERR
signal is a pointer that goes high when a potential tim-
ing mismatch is detected between PIC
LK
and the inter-
nally generated PC
LK
clock. When PHERR is fed back
to PHINIT, it initializes the FIFO so that it does not over-
flow or underflow.
The internally generated divide-by-16 clock is used to
clock out data from the FIFO. PHINIT and LOCKDET
signals will center the FIFO after the third PIC
LK
pulse.
This is done to ensure that PIC
LK
is stable. This
scheme allows the user to have an infinite PC
LK
to
PIC
LK
delay through the ASIC. Once the FIFO is cen-
tered, the PC
LK
and PIC
LK
can have a maximum drift of
5 ns.
During normal operation, the incoming data is passed
from the PIC
LK i
nput timing domain to the internally
generated divide-by-16 PC
LK
timing domain. Although
the frequency of PIC
LK
and PC
LK
are the same, their
phase relationship is arbitrary. To prevent errors
caused by short setup or hold times between the two
domains, the timing generator circuitry monitors the
phase relationship between PIC
LK
and PC
LK
.
When an FIFO timing violation is detected, the phase
error (PHERR) signal pulses high. If the condition per-
sists, PHERR will remain high. When PHERR is fed
back into the PHINIT input (by shorting them on the
printed-circuit board [PCB]), PHINIT will initialize the
FIFO if PHINIT is held high for at least two byte clocks.
The initialization of the FIFO prevents PC
LK
and PIC
LK
from concurrently trying to read and write over the
same FIFO bank.
During realignment, one to three bytes (16-bits wide)
will be lost. Alternatively, the customer logic can take in
the PHERR signal, process it, and send an output to
the PHINIT input in such a way that only idle bytes are
lost during the initialization of the FIFO. Once the FIFO
has been initialized, PHERR will go inactive.
18
18
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Timing Characteristics
(continued)
Input Timing Mode 1
In the configuration shown in Figure 4, PHERR to
PHINIT has a zero delay (shorted on the PCB) and the
PC
LK
is used to clock 16-bit-wide data out of the cus-
tomer ASIC. The FIFO in the multiplexer is 16-bits wide
and six registers deep.
The PC
LK
and PIC
LK
signals respectively control the
READ and WRITE counters for the FIFO. The data
bank from the FIFO has to be read by the internally
generated clock (PC
LK
) only once after it has been writ-
ten by the PIC
LK
input.
Since the delay in the customer ASIC is unknown, the
two clocks (PC
LK
and PIC
LK
) might drift in respect to
each other and try to perform the read and writer oper-
ation on the same bank in the FIFO at the same time.
However, before such a clock mismatch can occur,
PHERR goes high and, if externally connected to
PHINIT, will initialize the FIFO provided PHINIT
remains high for at least two byte clocks. One to three
16-bit words of data will be lost during the initialization
of the FIFO.
Figure 4. Block Diagram Timing Mode 1
CUSTOMER LOGIC
TA16 TRANSPONDER
FIFO
PLL
DIVIDER
OSCILLATOR
T
X
REFCLK
16
PHERR
PHINIT
PCLK
PICLK
LOCKDET
155.52 MHz
20 ppm
TIMING
GENERATOR
INTERNAL
TXD[0:15]
CLOCK
DATA
CENTERS
FIFO
PCLK
1-1020(F)
19
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Timing Characteristics
(continued)
Input Timing Mode 2
To avoid the loss of data, idle or dummy bytes should
be sent on the T
X
D[0:15] bus whenever PHERR goes
high. In the configuration shown in Figure 5, the
PHERR signal is used as an input to the customer
logic. Upon detecting a high on the PHERR signal, the
customer logic should return a high signal, one that
remains high for at least two byte-clock cycles, to the
PHINIT input of the TA16. Also, when PHERR goes
high, the customer logic should start sending idle or
dummy bytes to the TA16 on the T
X
D[0:15] bus. This
should continue until PHERR goes low.
The FIFO is initialized two-to-eight byte clocks after
PHINIT goes high for two byte clocks. PHERR goes
low after the FIFO is initialized. Upon detecting a low
on PHERR, the customer logic can start sending real
data bytes on T
X
D[0:15]. The two timing loops (PC
LK
to
PIC
LK
and PHERR to PHINIT) do not have to be of
equal length.
Figure 5. Block Diagram Timing Mode 2
CUSTOMER LOGIC
TA16 TRANSPONDER
FIFO
PLL
DIVIDER
OSCILLATOR
T
X
REFCLK
16
PHERR
PHINIT
PCLK
PICLK
LOCKDET
155.52 MHz
20 ppm
TIMING
GENERATOR
INTERNAL
TXD[0:15]
CLOCK
DATA
CENTERS
FIFO
PCLK
D
Q
1-1021(F)
20
20
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Figure 6. Forward Clocking of the TA16 Transmitter
CUSTOMER LOGIC
TA16 TRANSPONDER
FIFO
PLL
DIVIDER
T
X
REFCLK
16
PHERR
PHINIT
PCLK
PICLK
LOCKDET
TIMING
GENERATOR
INTERNAL
TXD[0:15]
CLOCK
DATA
CENTERS
FIFO
PCLK
OSCILLATOR
155.52 MHz
20 ppm
T
X
REFCLK
CLOCK
BUFFER
Timing Characteristics
(continued)
Forward Clocking
In some applications, it is necessary to forward-clock
the data in a SONET/SDH system. In this application,
the reference clock from which the high-speed serial
clock is synthesized and the parallel data clock both
originate from the same source on the customer appli-
cation circuit. The timing control logic in the TA16 tran-
sponder transmitter automatically generates an internal
load signal that has a fixed relationship to the reference
clock. The logic takes into account the variation of the
reference clock to the internal load signal over temper-
ature and voltage. The connections required to imple-
ment this clocking method are shown in Figure 6. The
setup and hold times for PIC
LK
to TxD[0:15] must be
met by the customer logic.
Possible problems: to meet the jitter generation specifi-
cations required by SONET/SDH, the jitter of the refer-
ence clock must be minimized. It could be difficult to
meet the SONET jitter generation specifications using
a reference clock generated from the customer logic.
1-1122(F)
21
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Timing Characteristics
(continued)
PC
LK
-to-PIC
LK
Timing
After powerup or RESET, the LOCKDET signal will go
active, signifying that the PLL has locked to the clock
provided on the T
X
R
EF
C
LK
input. The FIFO is initialized
on the third PIC
LK
after LOCKDET goes active. The
PC
LK
-to-PIC
LK
delay (t
D
) can have any value before
the FIFO is initialized. The t
D
is fixed at the third PICLK
after LOCKDET goes active. Once the FIFO is initial-
ized, PC
LK
and PIC
LK
cannot drift more than 5.2 ns;
tCH cannot be more than 5.2 ns.
Figure 7. PC
LK
-to-PIC
LK
Timing
PCLK
PICLK
LOCKDET
ACTIVE
3RD
IS INITALIZED AT THE THIRD RISING EDGE OF
PICLK AFTER LOCKDET GOES ACTIVE.
PCLK-TO-PICLK DELAY IS FIXED AND FIFO
2ND
1ST
tCH
tCH
tD
tD
1123(F)
22
22
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Timing Characteristics
(continued)
PHERR/PHINIT
Case 1-- PHERR and PHINIT are shorted on the
printed-circuit board:
PHINIT would go high whenever there is a potential
timing mismatch between PC
LK
and PIC
LK
. PHINIT
would remain high as long as the timing mismatch
between PC
LK
and PIC
LK
. If PHINIT is high for more
than two byte clocks, the FIFO will be initialized.
PHINIT will initialize the FIFO two-to-eight byte clocks
after it is high for at least two byte clocks, PHERR (and
thus PHINIT) goes active once the FIFI is initialized.
Case 2--PHERR signal is input to the customer logic
and the customer logic outputs a signal to PHINIT:
Another possible configuration is where the PHERR
signal is input into the customer logic and the customer
logic sends an output to the PHINIT input. However, the
customer logic must ensure that, upon detecting a high
on PHERR, the PHINIT signal remains high for more
than two byte clocks. If PHINIT is high for less than two
byte clocks, the FIFO is not guaranteed to be initialized.
Also, the customer logic must ensure that PHINIT goes
low after the FIFO is initialized (PHERR goes low).
Figure 8. PHERR/PHINIT Timing
Figure 9. ac Input Timing
PHERR
PHINIT
PCLK
PICLK
INTERNAL
PCLK
MINIMUM PULSE
WIDTH REQUIRED
TO CENTER
THE FIFO
2 BYTE
CLOCKS
2--8 BYTE CLOCKS
CUSTOMER ASIC SENDS A
MINIMUM PULSE WIDTH OF
2 BYTE CLOCKS UPON DETECTING
A HIGH ON PHERR
FIFO IS INITIALIZED 2--8 BYTE CLOCKS
AFTER PHINIT IS HIGH FOR 2 BYTE CLOCKS
PHERR GOES HIGH ON
DETECTING A FIFO TIMING ERROR
PICLKP
TXD[0:15]
t
STXD
t
HTXD
1125(F)
1027(F)
23
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Timing Characteristics
(continued)
1. 20% to 80%; 330
to GND
Figure 10. Receiver Output Timing Diagram
Table 9. Transmitter ac Timing Characteristics
Symbol
Description
Min
Max
Unit
t
ST
X
D
TxD[0:15] Setup Time w. r. t. PIC
LK
1.5
--
ns
t
HT
X
D
TxD[0:15] Hold Time w. r. t. PIC
LK
0.5
--
ns
--
PC
LK
P/N Duty Cycle
40
60
%
--
PIC
LK
P/N Duty Cycle
40
60
%
t
D
PC
LK
-to-PIC
LK
Drift After FIFO is Centered
--
5.2
ns
Table 10. Receiver ac Timing Characteristics
Symbol
Description
Min
Max
Unit
--
POC
LK
Duty Cycle
45
55
%
--
RxD[15:0] Rise and Fall Time
1
--
1.0
ns
tP
POUT
POC
LK
Low to RxD[15:0] Valid prop. delay
1
1
ns
tS
POUT
RxD[15:0] and FP Setup Time w. r. t. POC
LK
2
--
ns
tH
POUT
RxD[15:0] and FP Hold Time w. r. t. POC
LK
2
--
ns
POCLKP
FP
tP
POUT
tS
POUT
tH
POUT
RXD[15:0]
1-1022(F)
24
24
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Timing Characteristics
(continued)
Receiver Framing
Figure 11 shows a typical reframe sequence in which a
byte realignment is made. The frame and byte bound-
ary detection is enabled by the rising edge of OOF.
Both the frame and byte boundaries are recognized
upon receipt of the first A2 byte following three consec-
utive A1 bytes. The third A2 byte is the first data byte to
be reported with the correct byte alignment on the out-
going data bus (RxD[15:0]). Concurrently, the frame
pulse (FP) is set high for one POC
LK
cycle.
The frame and byte boundary detection block is acti-
vated by the rising edge of OOF and stays active until
the first FP pulse.
Figure 12 shows the frame and byte boundary detec-
tion activation by a rising edge of OOF and deactivation
by the first FP pulse.
Figure 13 shows the frame and byte boundary detec-
tion by the activation of a rising edge of OOF and deac-
tivation by the FRAMEN input.
Figure 11. Frame and Byte Detection
1-1024(F)
Figure 12. OOF Timing (FRAMEN = High)
RECOVERED
CLOCK
OOF
SERIAL
DATA
RXD[15:0]
ROCLK
A1
A1
A1
A2
A2
A2
A2
A2
A2
A1, A1
A1, A1
A1, A1
A2, A2
A2, A2
A2, A2
A2, A2
INVALID DATA
VALID DATA
FP
OOF
FP
SEARCH
BOUNDARY DETECTION ENABLED
1-1023(F)r.3
25
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Timing Characteristics
(continued)
1-1025(F)
Figure 13. FRAMEN Timing
Figure 14. Interfacing to the TxRefClk Input
BOUNDARY DETECTION ENABLED
OOF
FRAMEN
FP
SEARCH
SONET/SDH
INTERFACE
IC
(V
CC
= 3.3 V)
PLL
CLOCK
SYNTHESIZER
MULTIPLEXER
TA16 TRANSPONDER
TXREFCLKP
TXREFCLKN
50
TRANSMISSION LINES
DIFFERENTIAL INTERFACE
CONNE
CT
OR
10
0
33
0
33
0
SONET/SDH
INTERFACE
IC
(V
CC
= 3.3 V)
PLL
CLOCK
SYNTHESIZER
MULTIPLEXER
TA16 TRANSPONDER
TXREFCLKP
TXREFCLKN
50
TRANSMISSION LINES
SINGLE-ENDED INTERFACE
CONNE
CT
O
R
60
33
0
0.1
F
30
0
FOR A SINGLE-ENDED INPUT,
THE INPUT IMPEDANCE IS
EQUIVALENT TO 60
.
26
Agere Systems Inc.
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Qualification and Reliability
To help ensure high product reliability and customer satisfaction, Agere is committed to an intensive quality pro-
gram that starts in the design phase and proceeds through the manufacturing process. Optoelectronics modules
are qualified to Agere internal standards using MIL-STD-883 test methods and procedures and using sampling
techniques consistent with Telcordia Technologies * requirements. This qualification program fully meets the intent
of Telcordia Technologies reliability practices TR-NWT-000468 and TA-TSY-000983. In addition, the Agere Opto-
electronics design, development, and manufacturing facility has been certified to be in full compliance with the lat-
est ISO
-9001 Quality System Standards.
* Telcordia Technologies is a trademark of Telcordia Technologies, Inc.
ISO is a registered trademark of the International Organization for Standardization.
Laser Safety Information
Class I Laser Product
All versions of the TA16-type transponders are classified as Class I laser products per FDA/CDRH, 21 CFR 1040
Laser Safety requirements. The transponders have been registered/certified with the FDA under Accession Num-
ber 8720009. All versions are classified as Class I laser products per IEC
60825-1:1993.
CAUTION: Use of controls, adjustments, and procedures other than those specified herein may result in
hazardous laser radiation exposure.
This product complies with 21 CFR 1040.10 and 1040.11.
8.8
m/125 m single-mode pigtail with 900 m tight buffer jacket and connector.
Wavelength = 1.3
m, 1.5
m.
Maximum power = 1.6 mW.
Product is not shipped with power supply.
Because of size constraints, laser safety labeling is not affixed to the module but is attached to the outside of the
shipping carton.
NOTICE
Unterminated optical connectors can emit laser radiation.
Do not view with optical instruments.
Electromagnetic Emissions and Immunity
The TA16 transponder will be tested against CENELEC EN50 081 part 1 and part 2, FCC 15, Class B limits for
emissions.
The TA16 transponder will be tested against CENELEC EN50 082 part 1 immunity requirements.
IEC is a registered trademark of The International Electrotechnical Commission.
27
Agere Systems Inc.
Data Sheet
TA16-Type 2.5 Gbits/s Transponder with
March 2001
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
Outline Diagram
Dimensions are in inches and (millimeters).
1-1012(F).d
3.600
(91.44)
2.600
(66.04)
0.500
(12.70)
0.50 (12.7)
0.28 (7.11)
0.65
0.22 (5.59)
(19.05)
0.75
(16.51)
1.50
(38.10)
0.450
(11.43)
TRANSMITTER
RECEIVER
PIN 1
1.80
(45.72)
0.30
(7.62)
0.45
(11.43)
1.5 (38.1)
MAX
TX
RX
34.5 (875)
43.0 (1100)
1.840
(46.74)
0.92
(22.37)
1.30
(33.02)
0.380
(9.65)
0.45
(11.43)
C
L
160-PIN JAE CONNECTOR
MAT'G P/N WR-160PB-VF50-A3
MOUNTING HOLES (3 PLACES)
M2.5 x 0.45 (METRIC)
2 mm MAXIMUM LENGTH INTO PACKAGE
TA16-Type 2.5 Gbits/s Transponder with
Data Sheet
16-Channel 155 Mbits/s Multiplexer/Demulitplexer
March 2001
Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liabi lity is assumed as a result of their use or application.
Copyright 2001 Agere Systems Inc.
All Rights Reserved
Printed in U.S.A.
March 2001
DS01-119OPTO (Replaces DS00-259OPTO)
For additional information, contact your Agere Systems Account Manager or the following:
INTERNET:
http://www.agere.com
E-MAIL:
docmaster@agere.com
N. AMERICA:
Agere Systems Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286
1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)
ASIA:
Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon
Tel. (852) 3129-2000, FAX (852) 3129-2020
CHINA: (86) 21-5047-1212 (Shanghai), (86) 10-6522-5566 (Beijing), (86) 755-695-7224 (Shenzhen)
JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 778-8833, TAIWAN: (886) 2-2725-5858 (Taipei)
EUROPE:
Tel. (44) 7000 624624, FAX (44) 1344 488 045
Ordering Information
* Other connectors may be made available.
Table 11. Ordering Information
Related Product Information
Code
Application
Connector
Comcode
TA16N1CAA
1310 nm, Intraoffice
SC
108440066
TA16N1FAA
1310 nm, Intraoffice
FC/PC
108440074
TA16S1CAA
1310 nm, Short Haul
SC
108432907
TA16S1FAA
1310 nm, Short Haul
FC/PC
108432915
TA16S2CAA
1550 nm, Short Haul
SC
108432923
TA16S2FAA
1550 nm, Short Haul
FC/PC
108432931
TA16L1CAA
1310 nm, Long Haul
SC
108432865
TA16L1FAA
1310 nm, Long Haul
FC/PC
108432873
TA16L2CAA
1550 nm, Long Haul
SC
108432881
TA16L2FAA
1550 nm, Long Haul
FC/PC
108432899
Table 12. Related Product Information
Description Document
Number
Using the Lucent Technologies Transponder Test Board Application Note
AP00-017OPTO
ORDER CODE:
16
XX
X XX
TA
BASIC PART NUMBER
STM LEVEL
APPLICATION
16 = STM-16 (SONET OC-48)
N1 = I-16, 1310 nm, intraoffice/(SONET short reach)
S1 = S-16.1, 1310 nm, short hauL (SONET IR-1)
S2 = S-16.2, 1550 nm, short haul (SONET IR-2)
L1 = L-16.1, 1310 nm, long hauL (SONET LR-1)
L2 = L-16.2, 1550 nm, long haul (SONET LR-2)
OPTIONS
CONNECTOR*
C = SC
F = FC