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

DUAL LOOP-BACK

Figure 22 depicts the data flow in dual-loopback. In this mode, selecting the jitter attenuator in the transmit path

will have the same result as placing the jitter attenuator in the receive path. In dual Loop-Back mode the

recovered clock and data from the line are looped back through the transmitter to the TTIP and TRING without

passing through the jitter attenuator. The transmit clock and data are looped back through the jitter attenuator

to the RCLK and RPOS/RDATA and RNEG pins.

FIGURE 22. SIGNAL FLOW IN DUAL LOOP-BACK MODE

TPOS

TNEG

TCLK

RCLK

RPOS

RNEG

Encoder

JA

Decoder

Timing

Control

Tx

TTIP

TRING

Data &

Clock

Recovery

RTIP

Rx

RRING

44

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