T7256 Agere Systems, T7256 Datasheet - Page 49

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

Lucent Technologies Inc.
February 1998
Questions and Answers
S/T-Interface
A34: (continued)
* Refer to the T7903 data sheet, Figure F-10 for an example of a switch circuit that can be used here.
NPx_NT
NPx_PT
T7903
T7234
TPR
TNR
143
143
10
10
Figure 22. T7903 to T7234 Direct-Connect Scheme with External S/T-Interface
(continued)
D1
D5
D7
D3
D2
D6
D8
D4
(continued)
6.8 V
6.8 V
10
10
5
ZD1
ZD2
5
T7234 Single-Chip NT1 (SCNT1) Euro-LITE Transceiver
0.1 F
*
10 k
10 k
10 k
10 k
2.0:1
2.0:1
T1
T2
NPx_NR
RPR
NPx_PR
RNR
T7903
T7234
JMP1
100
JMP3
167
JMP2
100
JMP4
100
T3
RJ-45
5-4728
45
1
2
3
4
5
6
7
8