CI0008A
1
43 Gb/s 1: 2 DEMUX
Features
Maximum input data rate: 43 Gb/s
Output amplitude: 0.9 Vpp
Single-ended clock/data input
General Description
The CI0008A is a 1: 2 demultiplexer operating at rates up to 43 Gb/s. The I/O levels are
SCFL (VH: 0.0 V, VL: -0.9 V). The IC is fabricated using a 0.1-m InP HEMT process.
The CI0008A is provided in a hermetically-sealed package with V-connectors.
Applications
1: 2 Demultiplexer
Functional Diagram
GD-01-1-60-42-120
28 Dec. 2001
SUGGESTED SPECIFICATION
Q0C
Q0T
D
Q
C
Din
f = f
0 Gb/s
CKin
50
70
70
D
Q
C
Q1C
Q1T
70
70
50
MS-DFF
TS-DFF
TS-DFF: Tri-Stage D-FF
MS-DFF: Master-Slave D-FF
f = f
0 GHz
1
2
CI0008A
3
Connection Table
No. NAME
FUNCTION
No. NAME
FUNCTION
1
Q0T
(2)
Data Output 0 (True)
8
Q1C
(2)
Data Output 1 (Complementary)
2
Q0C
(2)
Data Output 0 (Complementary)
9
Q1T
(2)
Data Output 1 (True)
3 GND
Ground (0.0 V)
10 GND
Ground (0.0 V)
4
Vrefd
(1)
Data Input
Reference
11 Vss Power Supply (-4.5 V)
5 Din
Data Input
12 CKin
Clock Input
6 NC No Internal Connection
13 NC No Internal Connection
7 GND
Ground (0.0 V)
14 GND
Ground (0.0 V)
Notes
(1) Adjust Vrefd in the range between -0.75 V and -0.2 V.
(2) Terminate unused output connectors to GND through 50-ohm resistors.
Connection Diagram (Top View)
Q1T
Q1C
Q0T
Q0C
NC
1
2
9
8
3
13
5
6
14
12
4
7
10
11
GND
GND
V
r
ef
d
GND
Vss
Di
n
GND
NC
CI0008A
CK
in
CI0008A
4
Absolute Maximum Ratings
SYMBOL PARAMETER
RATING
UNIT
VSS
Power Supply Voltage
-5.0 to +0.1
V
Vin
Applied Voltage Amplitude at Clock Input (CKin)
1.2 Vpp
Vind
Applied Voltage at Data Input (Din)
-1.2 to +0.1
V
Vinck
Applied Voltage at Clock Input (CKin)
-1.2 to +1.2
V
Vout
Applied Voltage at Data Outputs (Q0T, Q0C, Q1T, Q1C)
TBD V
Vrefd
Applied Voltage at Vrefd pin
-1.2 to +0.1
V
Tstor
Storage Temperature
TBD C
Tc
(1)
Case Temperature under Bias
TBD C
TBD: To Be Determined
Recommended Operating Conditions
SYMBOL PARAMETER MIN.
TYP.
MAX.
UNIT
VSS
Power Supply
-4.7 -4.5 -4.3 V
Vrefd
Data Input Reference Voltage
Adjust in the range from -0.75 V to -0.2 V
Din
Data Input Interface
DC coupling (see DC Characteristics)
CKin
Clock Input Interface
DC coupling (see DC Characteristics) or
AC coupling (see AC Characteristics)
Q0T, Q0C
Q1T, Q1C
Data Output Interface
DC coupling (see DC Characteristics),
Terminate to GND through 50
DC Characteristics
(Vss = -4.5. V, GND = 0.0 V, Tc
(1)
= 30 C)
SYMBOL
PARAMETER
MIN. TYP. MAX. UNIT
ISS
Power Supply Current
690
TBD
mA
VOH
Output Voltage, High (Q0T, Q0C, Q1T, Q1C)
TBD 0.0
V
VOL
Output Voltage, Low (Q0T, Q0C, Q1T, Q1C)
-0.9
TBD V
VIH
Input Voltage, High (Din, CKin)
TBD 0.0
V
VIL
Input Voltage, Low (Din, CKin)
-0.9
TBD V
TBD: To Be Determined
Note
(1) Tc: Temperature at package base.
CI0008A
5
AC Characteristics (43 Gb/s)
(Vss = -4.5 V, GND = 0.0 V, PN = 31, MR = 1/2, Vrefd: Adjust in the range from -0.75 V to -0.2 V)
Tc=30
C
SYMBOL PARAMETER
MIN TYP MAX
UNIT
Vin
Clock Input Voltage Amplitude
TBD 0.9 Vpp
Vcenter
Clock Input Center Voltage
-0.5 0.5 V
f
MAX
Maximum Input Data Rate
43
Gb/s
(1)
CK
MIN
Minimum Clock Frequency
15 GHz
Vamp
Output Voltage Amplitude
(Q0T, Q0C, Q1T, Q1C)
TBD 0.9 Vpp
tr
Output Rise Time
(Q0T, Q0C, Q1T, Q1C) 20 - 80%
10
TBD ps
tf
Output Fall Time
(Q0T, Q0C, Q1T, Q1C) 20 - 80%
10
TBD ps
PM
Phase Margin
200 deg.
(1), (2)
TBD: To Be Determined
Notes
(1)
Confirmed by error-free operation using pseudo-random pattern with a word length of 2
31
-1 bits at 43 Gb/s.
(2)
Calculated as follows:
PM (measured) [ps]
23.3 [ps] Input Data Jitter (pp) [ps]
X 360 [deg.]
PM [deg.] =
where, 23.3 ps =
1
43 Gb/s
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