XRT83SL30ES データシートの表示（PDF） - Exar Corporation

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XRT83SL30ES

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

Exar Corporation 

XRT83SL30

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

JUNE 2006

REV. 1.0.1

GENERAL DESCRIPTION

The XRT83SL30 is a fully integrated single-channel

short-haul line interface unit for T1(1.544Mbps) 100Ω,

E1(2.048Mbps) 75Ω or 120Ω and J1 110Ω

applications.

In T1 applications, the XRT83SL30 can generate five

transmit pulse shapes to meet the short-haul Digital

Cross-Connect (DSX-1) template requirements.

The XRT83SL30 provides both Serial Host

microprocessor interface and Hardware Mode for

programming and control. Both B8ZS and HDB3

encoding and decoding functions are included and

can be disabled as required. On-chip crystal-less jitter

attenuator with a 32 or 64 bit FIFO can be placed

either in the receive or the transmit path with loop

bandwidths of less than 3Hz. The XRT83SL30

provides a variety of loop-back and diagnostic

features as well as transmit driver short circuit

detection and receive loss of signal monitoring. It

supports internal impedance matching for 75Ω, 100Ω,

110Ω and 120Ω for both transmitter and receiver. For

the receiver this is accomplished with internal

resistors or through the combination of one single

fixed value external resistor and programmable

internal resistors. In the absence of the power supply,

the transmit output and receive input are tri-stated

allowing for redundancy applications. The chip

includes an integrated programmable clock multiplier

that can synthesize T1 or E1 master clocks from a

variety of external clock sources.

APPLICATIONS

• T1 Digital Cross-Connects (DSX-1)

• ISDN Primary Rate Interface

• CSU/DSU E1/T1/J1 Interface

• T1/E1/J1 LAN/WAN Routers

• Public switching Systems and PBX Interfaces

• T1/E1/J1 Multiplexer and Channel Banks

FEATURES

(See Page 2)

FIGURE 1. BLOCK DIAGRAM OF THE XRT83SL30 T1/E1/J1 LIU (HOST MODE)

MCLKE1

MCLKT1

TPOS / TDATA

TNEG / CODES

TCLK

QRPD

RCLK

RNEG / LCV

RPOS / RDATA

NLCD

RLOS

HW/HOST

CS

INT

MASTER CLOCK SYNTHESIZER

QRSS

PATTERN

GENERATOR

QRSS ENABLE

QRSS

DETECTOR

NETWORK

LOOP

DETECTOR

HDB3/

B8ZS

ENCODER

TAOS

ENABLE

TX/RX JITTER

ATTENUATOR

TIMING

CONTROL

TX FILTER

& PULSE

SHAPER

DRIVE

MONITOR

LINE

DRIVER

REMOTE

LOOPBACK

DIGITAL

LOOPBACK

LOOPBACK

ENABLE

HDB3/

B8ZS

DECODER

TX/RX JITTER

ATTENUATOR

TIMING &

DATA

RECOVERY

LBO[3:0]

PEAK

DETECTOR

& SLICER

LOCAL

ANALOG

LOOPBACK

RX

EQUALIZER

NLCD ENABLE

LOS

DETECTOR

AIS

DETECTOR

EQUALIZER

CONTROL

Serial Interface

TEST

MCLKOUT

DMO

TTIP

TRING

TXON

RTIP

RRING

AISD

ICT

SDO

SCLK

SDI

RESET

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com

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