Datasheet > LXT322QE

LXT322QE

更新时间： 2024-11-25 19:09:39

品牌	Logo	应用领域
LevelOne		PC 电信电信集成电路
页数	文件大小	规格书
36页	782K
描述
PCM Transceiver, 2-Func, CMOS, PQFP44, PLASTIC, QFP-44

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LXT322QE 数据手册

DATA SHEET

JANUARY 1999

Revision 2.1

LXT332

Dual T1/E1 Line Interface Unit with Crystal-less Jitter Attenuation

General Description

Features

The LXT332 is a fully integrated Dual Line Interface Unit

(DLIU) for both 1.544 Mbps (T1) and 2.048 Mbps (E1)

applications. It features B8ZS/HDB3 encoders and

decoders, and a constant low output impedance transmitter

for high return loss. Transmit pulse shape is selectable for

various line lengths and cable types.

• Digital (crystal-less) jitter attenuation, selectable for

receive or transmit path, or may be disabled

• High transmit and receive return loss

• Constant low output impedance transmitter with

programmable equalizer shapes pulses to meet DSX-1

pulse template from 0 to 655 ft.

The LXT332 incorporates an advanced crystal-less digital

jitter attenuator, switchable to either the transmit or receive

side. This eliminates the need for an external quartz

crystal. It offers both a serial interface (SIO) for

microprocessor control and a hardware control mode for

stand-alone operation.

• Meets or exceeds industry specifications including

ITU G.703, ANSI T1.403, AT&T Pub 62411 and

ITU-T G.742

• Compatible with most industry standard framers

The LXT332 offers a variety of advanced diagnostic and

performance monitoring features. It uses an advanced

double-poly, double-metal CMOS process and requires

only a single 5-volt power supply.

• Complete line driver, data recovery and clock

recovery functions

• Minimum receive signal of 500 mV, with selectable

slicer levels to improve SNR

Applications

• PCM/Voice Channel Banks

• Data Channel Bank/Concentrator

• T1/E1 multiplexer

• Digital Access and Cross-connect Systems (DACS)

• Computer to PBX interface (CPI & DMI)

• SONET/SDH Multiplexers

• Local, remote, and dual loopback functions

• Built-In Self Test with QRSS Pattern Generator

• Transmit/Receive performance monitors with Driver

Fail Monitor (DFM) and Loss of Signal (LOS)

outputs

• Receiverjittertolerance 0.4UI from40 kHzto100 kHz

• Available in 44-pin PLCC and 44-pin QFP packages

• Interfacing Customer Premises Equipment to a CSU

• Digital Loop Carrier (DLC) terminals

LXT332

Block Diagram

QRSS / BPV Generator

TCLK

TTIP

Transmit

Timing &

Control

Line

Equalizer

Driver

TPOS

TNEG

B8ZS/HDB3

Unipolar

Encoder

TRING

DFM

Monitor

DFM

TAOS

Enable

Encoder

Enable

LEN Select

Serial Word

LLOOP

Enable

Remote

Loopback

Local

Loopback

Decoder

Enable

Internal

Clock

Generator

RLOOP

Enable

MCLK

HFC

Jitter

Attenuator

JASEL

Peak

Detector

RTIP

RRING

RPOS

RNEG

RCLK

B8ZS/HDB3

Unipolar

Timing &

Data

Decoder

INT0/1

PS0/1

CLKE

SCLK

SDI

Recovery

Serial

Port

LOS

QRSS Detector

Processor

Transceiver 0

Transceiver 1

LOS

SDO

Refer to www.level1.com for most current information.

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与LXT322QE相关器件

型号	品牌	获取价格	描述	数据表
LXT324JE	ETC	获取价格	PCM Receiver
LXT324NE	ETC	获取价格	PCM Receiver
LXT324PE	ETC	获取价格	PCM Receiver
LXT325	LevelOne	获取价格	T1/E1 Integrated Quad Receiver
LXT325JE	LevelOne	获取价格	PCM Receiver, CEPT PCM-30/E-1, CMOS, CDIP28,
LXT325NE	LevelOne	获取价格	T1/E1 Integrated Quad Receiver
LXT325PE	LevelOne	获取价格	T1/E1 Integrated Quad Receiver
LXT325QE	LevelOne	获取价格	T1/E1 Integrated Quad Receiver
LXT325TOLXT336	ETC	获取价格	LXT325 to LXT336 - Migrating from LXT325 to LXT336 Quad Receiver
LXT331	LevelOne	获取价格	Dual T1/E1 Line Interface Unit

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