ASAHI KASEI [AK2540]
MS0012-E-00 2000/1
1
AK2540
Quad T1 Transceiver
FEATURE
- 4ch short haul T1 transceiver with jitter attenuator
- Jitter Tolerance: Compliant with GR-499 Category I,II and TR 62411
- Transmitter Pulse Shape: Compliant with GR-499 and ANSI T1.102 (1993)
- Loss of Signal Detection
- Local/Remote Loopback Mode
- Driver Failure Monitor
- Current limiter in transmit drivers for short circuits protection
- Hardware/Host Control Mode
- Single 3.3V5% or 5.0V5% Operation
- Low Power Consumption
- Package: 144LQFP
BLOCK DIAGRAM
Quad T1 Transceiver Block Diagram
TRANSCEIVER 1
TRANSCEIVER 2-4
CLOCK
&DATA
RECOVERY
CLKGEN
MCLK
RTIP1
RRING1
RCLK1
RPOS1
RNEG1
LOS1
RCLK2-4
RPOS2-4
RNEG2-4
TCLK2-4
TPOS2-4
TNEG2-4
PULSE
SHAPER
TTIP1
TRING1
TNEG1
TPOS1
TCLK1
CONTROL
DFM2-4
TTIP2-4
TRING2-4
RTIP2-4
RRING2-4
LOS2-4
Local Loopback
Remote Loopback
LOS
JITTER
ATT
DFM
DFM1
TAOS
MCLKSEL
ASAHI KASEI [AK2540]
MS0012-E-00 2000/1
2
GENERAL DESCRIPTIONS
The AK2540 is the quad short haul T1 transceiver for asynchronous applications, such as M13
MUX, etc. It includes Transmitter, Clock and Data Recovery, Jitter Attenuator, LOS Detector,
Driver Failure Monitor, Control Circuits, etc. in one LQFP-144 package. Internally generated
transmit pulse provides the appropriate pulse shape for line length ranging from 0 to 655 feet from
a DSX-1 cross connect.
PIN ASSIGNMENTS
DFM1
AIS1
TPOS1
TNEG1
TCLK1
LOS1
RPOS1
RNEG1
NC
RCLK1
DFM2
AIS2
NC
NC
TAVDD2
TAVSS2
NC
DVSS
DVDD
DAVSS1
NC
TPOS2
TNEG2
TCLK2
NC
LOS2
RPOS2
RNEG2
RCLK2
NC
JASELT
JASELR
NC
RAVDD
RAVSS
NC
108
107
106
105
104
103
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
144
143
142
141
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
DFM3
AIS3
TPOS3
TNEG3
TCLK3
LOS3
RPOS3
RNEG3
NC
RCLK3
DFM4
AIS4
TAVDD1
NC
TAVSS1
TPOS4
TNEG4
TCLK4
LOS4
RPOS4
RNEG4
RCLK4
DAVSS2
NC
IOVDD
IOVSS
NC
NC
AD0_LENG21
AD1_LENG11
AD2_LENG01
AD3_LENG22
AD4_LENG12
AD5_LENG02
AD6_LENG23
AD7_LENG13
NC
NC
NC
LLOOP4
RLOOP4
TTIP4
TVSS4
TVDD4
TRING4
AVSS4
NC
LLOOP3
RLOOP3
TTIP3
TVSS3
TVDD3
TRING3
AVSS3
NC
LLOOP2
RLOOP2
TTIP2
TVSS2
TVDD2
TRING2
AVSS2
NC
NC
LLOOP1
RLOOP1
TTIP1
TVSS1
TVDD1
TRING1
AVSS1
NC
NC
R/
W
(
WR
)
_LENG03
AS
(
ALE
)
_LENG24
DS
(
RD
)
_LENG14
CS_LENG04
BTS_AIS1SEL
INT
_LOMC
HWMODE
RESET
SEL5V
CLKE
TEST8
RRING4
RTIP4
TEST7
TEST6
RRING3
RTIP3
TEST5
PVSS
NC
MCLK
MCLKSEL
PVDD
BVDD
BGREF
BVSS
TEST4
RRING2
RTIP2
TEST3
TEST2
RRING1
RTIP1
TEST1
NC
(TOP VIEW)