ASAHI KASEI
[AK2504A]
MS0143-E-01 - 1 - 2004/01
AK2504A
DS3/STS-1/E3 Transceiver
GENERAL DESCRIPTION
The AK2504A is a DSP based line transceiver. It
provides the analog transmit/receive line interface
functions for DS3(44.736MHz) /STS-1(51.84MHz)
or E3(34.368MHz) interface.
Transmitter includes on-chip pulse shaper, B3ZS/
HDB3 Encoder. Pulse level adjustment function is
very useful to put a pulse into pulse mask for any
customer's system.
Receiver includes root-f equalizer, automatic-gain
control, clock and data recovery, B3ZS/HDB3
Decoder, Loss-Of-Signal and Loss-Of-Lock alarm
function.
Local and Remote Loop-back function is included
for system level trouble shooting.
The device operates at a single +3.3 Volt supply
and is transparent to the framing format.
PACKAGE
-
64 pin LQFP
FEATURE
-
"Robust" DSP based line transceiver
-
Provides Complete Analog Line Transmitter
and Receiver function for DS3, STS-1 and E3
Applications
-
Transmit Pulse Level Adjustment
-
Provides Line Equalization, and Clock and
Data Recovery Functions
-
Compliance with Bellcore GR-499-CORE and
GR-253-CORE, ANSI T1.102, T1.404,
-
Compliance with ITU-T G.703 and G.823
-
Local/Remote Loopback functions
-
B3ZS/HDB3 Encoder/Decoder
-
Low voltage supply : +3.3V
APPLICATIONS
-
Interfacing network transmission equipment
such as SONET multiplexor and M13 to a
DSX-3 cross connect.
-
Interfacing E3 network transmission
equipment.
- Interfacing customer premises equipment to a
line.
ASAHI KASEI
[AK2504A]
MS0143-E-01 - 3 - 2004/01
PIN LOCATION
NC
NC
TCAP1
VSST
TCAP2
TEST3
TEST4/eTX
TNDATA
TPDATA
TCLK
RNDATA/LCV
RPDATA
RCLK
TEST5
NC
NC
NC
NC
EQDIS
VDDV
VSSV
VDDB
IREF
PLA
VSSB
TEST6
VDDA
LBO
RESET
RLOS
NC
NC
NC
NC
TEST1
RT
I
P
RR
IN
G
E3
LO
STH
R
RC
KP
O
L
TEST7
TT
IP
VSST
TR
I
N
G
VDD
T
TA
O
S
NC
NC
NC
NC
NR
Z
VDD
P
VSS
P
TCK
P
O
L
EXCLK
RL
O
O
P
TEST2
LL
OOP
VSS
S
VDD
D
VSS
D
RL
O
L
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
NC: No Connection. Leave these pins open.
ASAHI KASEI
[AK2504A]
MS0143-E-01 - 4 - 2004/01
PIN CONDITION
No. Pin Name I/O
Pin Type
Maximum
AC load
Minimum
DC load
Status on
Reset
Remarks
3
NRZ I
CMOS
4
VDDP -
5
VSSP -
6
TCKPOL I CMOS
7
EXCLK I CMOS
8
RLOOP I CMOS
9
TEST2 I
CMOS
10
LLOOP I CMOS
11
VSSS -
12
VDDD -
13
VSSD -
14
RLOL O
CMOS
15pF
"H"
19
TEST5 I
CMOS
20
RCLK O
CMOS
15pF
"H"
21
RPDATA O CMOS
15pF
"L"
22
RNDATA
/LCV
O CMOS
15pF
"L"
23
TCLK I
CMOS
24
TPDATA I CMOS
25
TNDATA I CMOS
26
TEST4 O
CMOS
27
TEST3 I
CMOS
28
TCAP2 O Analog
Note 1
29
VSST -
30
TCAP1 O Analog
Note 1
Note:
*) NC pin number : No. 1, 2, 15, 16, 17, 18, 31, 32 NC: No Connection. Leave these pins open.
1)External capacitor (0.1 uF) is connected to VSS.
ASAHI KASEI
[AK2504A]
MS0143-E-01 - 5 - 2004/01
No. Pin Name I/O
Pin Type
Maximum
AC load
Minimum
DC load
Status on
Reset
Remarks
35
TAOS I
CMOS
36
VDDT -
37
TRING O
Analog
Hi-Z
38
VSST -
39
TTIP O
Analog
Hi-Z
40
TEST7 O
CMOS
41
RCKPOL I CMOS
42
LOSTHR I Analog
43
E3
I CMOS
44
RRING I Analog
45
RTIP I
Analog
46
TEST1 I
CMOS
51
EQDIS I
CMOS
52
VDDV -
53
VSSV -
54
VDDB -
55
IREF O
Analog
Note 2
56
PLA O
Analog
Note 3
57
VSSB -
58
TEST6 I
CMOS
59
VDDA -
60
LBO I
CMOS
61
RESET
I CMOS
Note 4
62
RLOS O
CMOS
15pF
"H"
Note
*)NC pin number : No. 33, 34, 47, 48, 49, 50, 63, 64 NC: No Connection. Leave these pins open.
2)External resister 4.7 k
1% should be connected between IREF and VSS.
3)External resister should be connected between PLA and VSS.
Normally 1.33k
is connected for DS3/STS-1 or 1.27k
for E3.
4)Pulled up to VDD with internal register. (typical 50k
)
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