XRT83SL38IB View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT83SL38IB' PDF : 88 Pages View PDF
XRT83SL38
OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
PRELIMINARY
REV. P1.1.0
TABLE 7: RECEIVE TERMINATIONS
RXTSEL TERSEL1 TERSEL0 RXRES1 RXRES0
Rext
0
x
x
x
x
Rext
1
0
0
0
0
∞
1
0
1
0
0
∞
1
1
0
0
0
∞
1
1
1
0
0
∞
Rint
∞
100Ω
110Ω
75Ω
120Ω
MODE
T1/E1/J1
T1
J1
E1
E1
1
0
0
0
1
240Ω
172Ω
T1
1
0
1
0
1
240Ω
204Ω
J1
1
1
0
0
1
240Ω
108Ω
E1
1
1
1
0
1
240Ω
240Ω
E1
1
0
0
1
0
210Ω
192Ω
T1
1
0
1
1
0
210Ω
232Ω
J1
1
1
0
1
0
210Ω
116Ω
E1
1
1
1
1
0
210Ω
280Ω
E1
1
0
0
1
1
150Ω
300Ω
T1
1
0
1
1
1
150Ω
412Ω
J1
1
1
0
1
1
150Ω
150Ω
E1
1
1
1
1
1
150Ω
600Ω
E1
Figure 12 is a simplified diagram for T1 (100Ω) in the external receive and transmit termination mode.
Figure 13 is a simplified diagram for E1 (75Ω) in the external receive and transmit /.termination mode.
FIGURE 12. SIMPLIFIED DIAGRAM FOR T1 IN THE EXTERNAL TERMINATION MODE (RXTSEL= 0)
X R T 8 3 S L 3 8 L IU
T T IP
3 .1 Ω
T R IN G
R T IP
R R IN G
3 .1 Ω
100Ω
1 :2 .4 5
1 :1
100Ω
100Ω
32
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