T7256 Agere Systems, T7256 Datasheet - Page 47

• 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 T7250 data sheet, Figure F-10 for an example of a switch circuit that can be used here.
Note: The circuit shown above has subtle differences from that shown in the T7250C data sheet. Either circuit is
T7250C
TPR
TNR
RPR
RNR
suitable, since they will both pass the required conformance tests.
D10
10 k
10 k
10
10
(continued)
D9
D1
D5
D7
D3
D2
D6
D8
D4
Figure 19. T7250C S/T Line Interface Scheme
(continued)
46.5
46.5
46.5
46.5
6.8 V
6.8 V
ZD1
ZD2
T7234 Single-Chip NT1 (SCNT1) Euro-LITE Transceiver
*
C1
0.1 F
2.5:1
2.5:1
T1
T2
100
100
JMP1
JMP2
T3
RJ-45
5-4723
43
1
2
3
4
5
6
7
8