tdat04622 ETC-unknow, tdat04622 Datasheet - Page 299

• Manufacturer Part Number: tdat04622
• Description: Tdat Sonet/sdh 155/622/2488 Mbits/s Data Interfaces
• Manufacturer: ETC-unknow

Data Sheet
May 2001
Agere Systems Inc.
Interface Timing Specifications
Transport Overhead Access Channel (TOAC) Interface Timing
Transport overhead access channel (TOAC) interface timing specifications are given for the transmit direction in
Figure 48 and in Table 172. The specifications for the receive direction are given in Figur e49, Figur e50, and in
Table 173.
* Clock pulse tCP = x/y, where:
Note: Duty cycles shown are nominal.
Table 172. Transmit TOAC Interface Timing Specifications
x = 32 for STS-3/STM-1 and STS-12/STM-4, or x = 8 for STS-48/STM-16;
y = clock frequency in MHz on the transmit line clock pins TxCKP/N.
Symbol
20.736 MHz (STS-12/STM-4)
t69
t70
t71
5.184 MHz (STS-3/STM-1)
OUTPUT—TxTOHF 8 kHz
INPUT—TxTOHD[D:A]
DUTY CYCLE CLOCK
OUTPUT—TxTOHCK
Test Conditions
(STS-48/STM-16)
C
L
= 50 pF
—
—
33%
(0.75)tCP*
Setup
(Min)
Figure 48. Transmit TOAC Interface Timing
10
—
—
66%
(Min)
Hold
(continued)
10
—
—
50%
tCP
t69
Propagation Delay
(Min)
50%
—
—
0
50%
t71
(Max)
t70
10
—
—
50%
155/622/2488 Mbits/s Data Interface
Unit
ns
ns
ns
50%
TDAT042G5 SONET/SDH
50%
33%
66%
0151(F).a
271