T7256 Agere Systems, T7256 Datasheet - Page 31

• Manufacturer Part Number: T7256
• Description: (T7234 - T7256) Compliance
• Manufacturer: Agere Systems

Lucent Technologies Inc.
February 1998
Timing Characteristics
Table 12. RESET Timing
Switching Test Input/Output Waveform
Propagation Delay
The maximum propagation delay from the S/T-interface to the U-interface (upstream direction) is 750 s. The max-
imum propagation delay from the U-interface to the S/T-interface (downstream direction) is 550 s.
tRSLFL, tFLRSH
Parameter
tRSLRSH
RESET Setup and Hold Time
RESET Low Time:
SYN8K
RESET
From Idle Mode or Normal Operation
From Power-on
2.4 V
0.4 V
Figure 14. Switching Test Waveform
Figure 13. RESET Timing Diagram
Description
tRSLFL
2.0 V
0.8 V
T7234 Single-Chip NT1 (SCNT1) Euro-LITE Transceiver
TEST POINTS
tRSLRSH
2.0 V
0.8 V
tFLRSH
Min
375
1.5
60
0.4 V
2.4 V
Max
—
—
—
Unit
ms
ns
s
5-3462 (C)
5-2118 (C)
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