T7256 Agere Systems, T7256 Datasheet - Page 46

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

T7234 Single-Chip NT1 (SCNT1) Euro-LITE Transceiver
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.
42
T7903
NPx_PT
NPx_NT
NPx_PR
NPx_NR
T7234
TPR
TNR
RPR
RNR
D10
10 k
10 k
10 k
10 k
75
75
10
10
(continued)
D9
D1
D3
D5
D7
D1
D5
D7
D3
D2
D6
D8
D2
D6
D8
D4
D4
Figure 17. T7234 S/T Line Interface Scheme
Figure 18. T7903 S/T Line Interface Scheme
(continued)
46.4
46.4
46.4
46.4
6.8 V
6.8 V
6.8 V
6.8 V
10
10
5
5
ZD1
ZD2
ZD1
ZD2
*
C1
0.1 F
C1
0.1 F
2.0:1
2.0:1
2.5:1
2.5:1
T1
T2
T1
T2
JMP1
JMP2
100
100
JMP1
JMP2
100
100
100
100
Lucent Technologies Inc.
T3
T3
February 1998
Data Sheet
RJ-45
RJ-45
5-4721
5-4722
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8