XRT59L91

更新时间： 2024-11-10 21:54:31

品牌	Logo	应用领域
艾科嘉 - EXAR		/
页数	文件大小	规格书
28页	294K
描述
Single-Chip E1 Line Interface Unit

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XRT59L91 数据手册

XRT59L91

Single-Chip E1

Preliminary

Line Interface Unit

October 1999-1

FEATURES

l Supports both Local- and Remote-Loop back

Operations

l Complete E1 (CEPT) line interface unit

(TransmitterandReceiver)

l Logic Inputs accept either 3.3V or 5.0V levels

l OperatesovertheIndustrialTemperatureRange

l Ultra Low Power Dissipation

l Generates transmit output pulses that are

compliant with the ITU-T G.703 Pulse Template

for 2.048Mbps (E1) rates

l On-Chip Pulse Shaping for both 75W and 120W

LineDrivers

l +3.3VSupplyOperation

l Receiver can either be transformer or capaci-

tively-coupled to the line

APPLICATIONS

l PDHMultiplexers

l Detects and Clears LOS (Loss of Signal) per

ITU-TG.775

l SDHMultiplexers

l Digital Cross-Connect Systems

l Compliant with the ITU-T G.823 Jitter Tolerance

Requirements

l DECT(DigitalEuropeanCordlessTelephone)

Base Stations

l Compliant with the ITU-T G.703 EOS Over-

l CSU/DSUEquipment.

l Test Equipment

voltageprotectionrequirements

GENERALDESCRIPTION

The receiver input can be transformer or capacitively-

coupled to the line. The receiver input is transformer-

coupled to the line, using the 2:1 step-down trans-

former. The transmitter is coupled to the line using a

1:2 step-up transformer. This same configuration is

applicable for both balanced (120W) and unbalanced

(75W)interfaces.

TheXRT59L91isanoptimizedsingle-chipanalog3.3V

E1 line interface unit (LIU) fabricated using low power

CMOS technology. The LIU IC consists of both a

Transmitter and a Receiver function. The Transmitter

acceptsaTTLorCMOSlevelsignalfromtheTerminal

Equipment;andoutputsthisdatatothelineviabipolar

pulses that are compliant to the ITU-T G.703 pulse

template for E1. The Receiver accepts an attenuated

bipolarlinesignal(fromtheremoteterminalequipment)

andoutputsthisdatatothe(near-end)terminalequip-

ment via CMOS level signals.

ORDERINGINFORMATION

Part No.

Package

Operating

Temperature Range

-40°C to +85°C

XRT59L91ID

16 LD JEDEC SOIC (300 mil)

Rev. P2.00

EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 ·(510) 668-7000 ·FAX (510) 668-7017

12 3 4 5 6 7...28

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