ASAHI KASEI [AK2548]
C0028-E-00 1999/9
1
AK2548
7 channel E1 Transceiver
FEATURE
7ch E1 transceiver
Jitter Tolerance: Compliant with ITU-T G.823, I.431
Transmitter Pulse Shape: Compliant with ITU-T G.703
Loss of Signal Detection: Compliant with ITU-T G.775
Return loss: Compliant with ETS 300 166
Selectable Signal Polarity
Local/Remote Loopback
Parallel/Serial Microprocessor Interface
Single 3.3V5% Operation
Low Power Consumption
Pin-to-pin compatible with AK2546(7 channel T1 transceiver) except serial interface
Small Plastic Package 144pin LQFP
BLOCK DIAGRAM
7 Channel E1 Transceiver Block Diagram
R / W ( W R )
TRANSCEIVER 1
TRANSCEIVER 2-7
RECOVER
CLKGEN
M C L K
RTIP1
R R I N G 1
A S ( A L E )
R C L K 1
R P O S
R N E G 1
L O S 1
RTIP2-7
R R I N G 2 - 7
L O S 2 - 7
R C L K 2 - 7
R P O S 2 - 7
R N E G 2 - 7
T C L K 2 - 7
T P O S 2 - 7
T N E G 2 - 7
D S ( R D )
TEST1-4
SHAPER
TTIP1
T R I N G 1
T N E G 1
T P O S
T C L K 1
CONTROL
TTIP2-7
T R I N G 2 - 7
A D 7 - A D 0
R E S E T
Local Loopback
Remote Loopback
C S
B T S
I N T
LOS
C L K S E L
P/S
S C L K
S D I
S D O
ASAHI KASEI [AK2548]
C0028-E-00 1999/9
2
GENERAL DESCRIPTION
The AK2548 is the 7 channel E1 transceiver for a SDH/SONET MUX, M13 MUX, etc.
It includes seven independent transmitters, clock and data recovery, LOS detector, control circuit
in one LQFP-144 package which saves space, power consumption and the board design time.
Internally generated transmit pulse provides the appropriate pulse shape.
PIN ASSIGNMENTS
TCLK7
TPOS7
TNEG7
RCLK7
RPOS7
RNEG7
TCLK6
TPOS6
TNEG6
RCLK6
RPOS6
RNEG6
IOVDD2
IOVSS2
TAVDD2
TAVSS2
TCLK5
TPOS5
TNEG5
RCLK5
RPOS5
RNEG5
DAVSS2
DVSS2
DVDD2
LOS7
LOS6
LOS5
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7/SDO
TCLK1
TPOS1
TNEG1
RCLK1
RPOS1
RNEG1
TCLK2
TPOS2
TNEG2
RCLK2
RPOS2
RNEG2
IOVDD1
IOVSS1
TAVDD1
TAVSS1
TCLK3
TPOS3
TNEG3
RCLK3
RPOS3
RNEG3
DAVSS1
DVSS1
DVDD1
TCLK4
TPOS4
TNEG4
RCLK4
RPOS4
RNEG4
LOS1
LOS2
LOS3
LOS4
RAVDD1
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
AVSS8
TTIP7
TVSS7
TVDD7
TRING7
AVSS7
TTIP6
TVSS6
TVDD6
TRING6
AVSS6
TTIP5
TVSS5
TVDD5
TRING5
AVSS5
TTIP4
TVSS4
TVDD4
TRING4
AVSS4
TTIP3
TVSS3
TVDD3
TRING3
AVSS3
TTIP2
TVSS2
TVDD2
TRING2
AVSS2
TTIP1
TVSS1
TVDD1
TRING1
AVSS1
R/W(WR)
AS(ALE)
/SCLK
DS(RD)
/SDI
CS
INT
PVDD
MCLK
PVSS
RAVSS2
RAVDD2
RESET
RRING7
RTIP7
BTS
RRING6
RTIP6
TEST4
RRING5
RTIP
5
TEST3
BVSS
BGREF
BVDD
TEST2
RRING4
RTIP4
P/S
RRING3
RTIP3
CLKSEL
RRING2
RTIP2
TEST1
RRING1
RTIP1
RAVSS1
(TOP VIEW)
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