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 10: TRANSMIT TERMINATION CONTROL

TRATIO

0

1

TURNS RATIO

1:2

1:2.45

Table 11 summarizes the transmit terminations.

TERSEL1

TABLE 11: TRANSMIT TERMINATIONS

TERSEL0 TXTSEL TRATIO

Rint Ω

0=EXTERNAL

1=INTERNAL

SET BY

CONTROL

BITS

n

Rext Ω

Cext

n, Rext, AND Cext ARE SUGGESTED

SETTINGS

0

T1

0

100 Ω

0

0

0

0

0Ω

2.45

3.1Ω

0

0

0

1

0Ω

2

3.1Ω

0

0

1

x

100Ω

2

0Ω

0.68µF

0

J1

0

110 Ω

0

1

0

0

0Ω

2.45

3.1Ω

0

1

0

1

0Ω

2

3.1Ω

0

1

1

x

110Ω

2

0Ω

0.68µF

1

E1

1

75 Ω

1

0

0

0

0Ω

2.45

6.2Ω

0

0

0

1

0Ω

2

9.1Ω

0

0

1

x

75Ω

2

0Ω

0.68µF

1

E1

1

120 Ω

1

1

0

0

0Ω

2.45

6.2Ω

0

1

0

1

0Ω

2

9.1Ω

0

1

1

x

120Ω

2

0Ω

0.68µF

REDUNDANCY APPLICATIONS

Telecommunication system design requires signal integrity and reliability. When a T1/E1 primary line card has

a failure, it must be swapped with a backup line card while maintaining connectivity to a backplane without

losing data. System designers can achieve this by implementing common redundancy schemes with the

XRT83SL30 Line Interface Unit (LIU). The XRT83SL30 offers features that are tailored to redundancy

applications while reducing the number of components and providing system designers with solid reference

designs. These features allow system designers to implement redundancy applications that ensure reliability.

The Internal Impedance mode eliminates the need for external relays when using the 1:1 and 1+1 redundancy

schemes.

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