Datasheet > XRT5897

XRT5897

更新时间： 2024-11-11 03:13:51

品牌	Logo	应用领域
艾科嘉 - EXAR		/
页数	文件大小	规格书
21页	609K
描述
Seven-Channel E1 Line Interface

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数据手册

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XRT5897 数据手册

XRT5897

Seven-Channel E1

Line Interface

December 2001-3

FEATURES

D Compliant with ITU G.703 Pulse Mask Template for

D Compliant with ITU--T G.823 Jitter Tolerance Re-

2.048Mbps (E1) Rates

quirements

D Logical Inputs Accept either 3.3V or 5.0V Levels

D Ultra-Low Power Dissipation

D Seven Independent CEPT Transceivers

D Supports Differential Transformer Coupled

Receivers and Transmitters

D +3.3V Supply Operation

D Individual Transmit Channel Over Temperature

D On Chip Pulse Shaping for Both 75Ω and 120Ω Line

Protection

Drivers

D Compliant with ITU G.775 LOS Declaration/Clearing

APPLICATIONS

Recommendation

D SDH Multiplexer

D Optional User Selectable LOS Declaration/Clearing

Delay

D Digital Cross Connects

GENERAL DESCRIPTION

The XRT5897 is an optimized seven channel 3.3V line

interface unit fabricated using low power CMOS

technology. The device contains seven independent E1

channels. It is primarily targeted toward SDH multiplexers

that accommodate TU12 Tributary Unit Frames. Line

cards in these units multiplex 21 E1 interfaces into higher

SDH rates. Devices with seven E1 interfaces such as the

XRT5897 provide the most efficient method of

implementing 21 channel line cards. Each channel

performs the driver and receiver functions necessary to

convert bipolar signals to logical levels and vice versa.

The device requires transformers on both receiver and

transmitter sides, and supports both balanced and

unbalanced interfaces.

The device offers two distinct modes of LOS detection.

The first method, which does not require an external

clock, provides an LOS output indication signal with

thresholds and delay that comply with the ITU G.775

requirements. In the second mode, the user provides an

external clock that increases the delay for LOS

declaration and clearing. This feature provides the user

with the flexibility to implement LOS specifications that

require a delay greater than the G.775 requirements.

ORDERING INFORMATION

Operating

Part No.

Package

100 Lead TQFP (14 x 14 x 1.4mm)

Temperature Range

XRT5897IV

-40°C to +75°C

Rev. 1.11

E2001

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

12 3 4 5 6 7...21

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