XRT83SL30IV(2003) View Datasheet(PDF) - Exar Corporation

Part Name

Description

Manufacturer

XRT83SL30IV
(Rev.:2003)

SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

Exar Corporation 

XRT83SL30

áç

SINGLE-CHANNEL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

REV. P1.0.4

PRELIMINARY

TABLE 19: MICROPROCESSOR REGISTER #1 BIT DESCRIPTION

D5

TERSEL1 Termination Impedance Select bit 1:

R/W

0

In the Host mode and in the internal termination mode (TXT-

SEL=”1” and RXTSEL=”1”), TERSEL[1:0] control the transmit

and receive termination impedance according to the following

table:

TERSEL1 TERSEL0 Termination

0

0

100Ω

0

1

110Ω

1

0

75Ω

1

1

120Ω

In the internal termination mode, the receiver termination of each

receiver is realized completely by internal resistors or by the

combination of internal and one fixed resistor (see description for

RXRES[1:0] bits).

In the internal termination mode, the transmitter output should be

AC coupled to the transformer.

D4

TERSEL0 Termination Impedance Select bit 0:

See description of bit D5 for the function of this bit.

R/W

0

45

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