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XRT83SL34IV 数据表(PDF) 37 Page - Exar Corporation

部件名 XRT83SL34IV
功能描述  QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
PDF  80 Pages
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制造商  EXAR [Exar Corporation]
网页  http://www.exar.com
标志 EXAR - Exar Corporation

XRT83SL34IV 数据表(HTML) 37 Page - Exar Corporation

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XRT83SL34
QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
PRELIMINARY
REV. P1.0.8
34
RECEIVE
For N+1 redundancy, the receivers on the primary cards should be programmed for internal impedance mode.
The receivers on the backup card should be programmed for external impedance mode. Since there is no
external resistor in the circuit, the receivers on the backup card will be high impedance. Select the impedance
for the desired mode of operation, T1/E1/J1. To swap the primary card, set the backup card to internal
impedance mode, then the primary card to external impedance mode. See Figure 17. for a simplified block
diagram of the receive section for a N+1 redundancy scheme.
NOTE: For simplification, the over voltage protection circuitry was omitted.
FIGURE 17. SIMPLIFIED BLOCK DIAGRAM - RECEIVE SECTION FOR N+1 REDUNDANCY
B a ckp lane In te rface
P rim ary C a rd
X R T 83S L3 4
Rx
Line In te rface C a rd
P rim ary C a rd
X R T 83S L3 4
Rx
P rim ary C a rd
X R T 83S L3 4
Rx
B a ckup C a rd
X R T 83S L3 4
Rx
R xT S E L =1 , In te rn a l
R xT S E L =1 , In te rn a l
R xT S E L =1 , In te rn a l
R xT SEL=1 , Exte rnal
T 1 /E 1 Line
T 1 /E 1 Line
T 1 /E 1 Line
1:1
1:1
1:1



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