XRT83SL38IB View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XRT83SL38IB

OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER

Exar Corporation 

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XRT83SL38

OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

PRELIMINARY

REV. P1.1.0

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

Backplane Interface

Line Interface Card

Primary Card

XRT83SL38

Rx

RxTSEL=1, Internal

1:1

T1/E1 Line

Primary Card

XRT83SL38

Rx

RxTSEL=1, Internal

1:1

T1/E1 Line

Primary Card

XRT83SL38

Rx

RxTSEL=1, Internal

1:1

T1/E1 Line

Backup Card

XRT83SL38

Rx

RxTSEL=1, External

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