XRT75R03D datasheet(1/134 Pages) EXAR

tên linh kiện	XRT75R03D

Giải thích chi tiết về linh kiện	THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER

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nhà sản xuất	EXAR [Exar Corporation]

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

XRT75R03D

THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER

DECEMBER 2003

REV. 1.0.2

GENERAL DESCRIPTION

The XRT75R03D is a three-channel fully integrated

Line Interface Unit (LIU) featuring EXAR’s R3

Technology (Reconfigurable, Relayless Redundancy)

with Jitter Attenuator for E3/DS3/STS-1 applications.

It

incorporates

3

independent

Receivers,

Transmitters and Jitter Attenuators in a single 128 pin

LQFP package.

Each

channel

of

the

XRT75R03D

can

be

independently configured to operate in the data rate,

E3 (34.368 MHz), DS3 (44.736 MHz) or STS-1 (51.84

MHz). Each transmitter can be turned off and tri-

stated for redundancy support or for conserving

power.

The XRT75R03D’s differential receiver provides high

noise interference margin and is able to receive the

data over 1000 feet of cable or with up to 12 dB of

cable attenuation.

The XRT75R03D incorporates an advanced crystal-

less jitter attenuator per channel that can be selected

either in the transmit or receive path. The jitter

attenuator performance meets the ETSI TBR-24 and

Bellcore GR-499 specifications.

The

XRT75R03D

provides

both

Serial

Microprocessor Interface as well as Hardware mode

for programming and control.

The XRT75R03D supports local, remote and digital

loop-backs. The device also has a built-in Pseudo

Random Binary Sequence (PRBS) generator and

detector with the ability to insert and detect single bit

error for diagnostic purposes.

FEATURES

RECEIVER:

• R3

Technology

(Reconfigurable,

Relayless

Redundancy)

• On chip Clock and Data Recovery circuit for high

input jitter tolerance

• Meets E3/DS3/STS-1 Jitter Tolerance Requirement

• Detects and Clears LOS as per G.775

• Receiver Monitor mode handles up to 20 dB flat

loss with 6 dB cable attenuation

• On chip B3ZS/HDB3 encoder and decoder that can

be either enabled or disabled

• On-chip clock synthesizer provides the appropriate

rate clock from a single 12.288 MHz Clock

• Provides low jitter output clock

TRANSMITTER:

• R3

Technology

(Reconfigurable,

Relayless

Redundancy)

• Compliant with Bellcore GR-499, GR-253 and ANSI

T1.102 Specification for transmit pulse

• Tri-state Transmit output capability for redundancy

applications

• Each Transmitter can be independently turned on

or off

• Transmitters provide Voltage Output Drive

JITTER ATTENUATOR:

• On chip advanced crystal-less Jitter Attenuator for

each channel

• Jitter Attenuator can be selected in Receive or

Transmit paths

• Meets ETSI TBR 24 Jitter Transfer Requirements

• Compliant with jitter transfer template outlined in

ITU G.751, G.752, G.755 and GR-499-CORE,1995

standards

• Jitter Attenuator can be disabled

CONTROL AND DIAGNOSTICS:

• 5 wire Serial Microprocessor Interface for control

and configuration

• Supports optional internal Transmit driver

monitoring

• Hardware Mode for control and configuration

• Each channel supports Local, Remote and Digital

Loop-backs

• Single 3.3 V ± 5% power supply

• 5 V Tolerant I/O

• Available in 128 pin LQFP

• - 40°C to 85°C Industrial Temperature Range

APPLICATIONS

• E3/DS3 Access Equipment

• STS1-SPE to DS3 De-Synchronizing

• DSLAMs

• Digital Cross Connect Systems

• CSU/DSU Equipment

• Routers

• Fiber Optic Terminals

Số phần tương tự - XRT75R03D

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Exar Corporation	XRT75R03D	850Kb / 135P	EXAR DATA SHEET FORMAT TEMPLATES
	XRT75R03DIV	850Kb / 135P	EXAR DATA SHEET FORMAT TEMPLATES
	XRT75R03D	850Kb / 135P	EXAR DATA SHEET FORMAT TEMPLATES

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nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
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