product brief
Intel
Internet Exchange
Architecture
Intel
LXT384
Octal T1/E1/J1 Line Interface Unit
Intel Delivers
Intel introduces a family of T1/E1 3.3V
transceivers that are pin-to-pin and software
compatible. This LXT product series includes
the Intel
LXT380, LXT381, LXT386, and
LXT388 (detailed in separate product briefs),
and the LXT384 (detailed in this product
brief). With Intel's range of transceivers, you
have the flexibility to change from E1-only
designs to T1/E1 designs and migrate from
two to eight ports (or vice versa) with little
time and effort.
The Intel
LXT384 is an octal 3.3V short-haul
PCM transceiver for use in either 1.544Mbps
(T1) or 2.048Mbps (E1) applications. It incorpo-
rates eight receivers and eight transmitters in a
single 144-pin LQFP or 160 PBGA package.
The LXT384 is the world's first fully integrated
octal transceiver incorporating an advanced
crystal-less, digital Jitter Attenuator (JA) that
meets CTR12/13 and the latest SONET/SDH
requirements. You can configure the LXT384 as
a seven-channel transceiver with the additional
channel configured as a G.772-compliant non-
intrusive performance monitor.
Intel Advantage
With the introduction of its LXT38x series, Intel
offers a transceiver that supports G.772 non-
intrusive performance monitoring. This feature
allows one channel to eavesdrop on other
channels for remote monitoring and debugging
purposes without interrupting service. This
powerful tool can help you reduce system
downtime and achieve faster time-to-market.
The Intel
LXT384 also offers Intel
Hitless
Protection Switching (Intel
HPS), which
incorporates fast tri-stateable drivers and a
constant delay JA. Intel
HPS helps you
reduce system cost by eliminating costly
mechanical relays and opto-isolators in 1+1
protection and redundancy applications. The
switch from primary to backup board is less
than 1s--more than 1,000 times faster than
mechanical relays--and helps eliminate loss
of frame synchronization. A maximum of 1 bit
error is generated when Intel
HPS is used
instead of relays, which can generate more
than 6,000 bit errors. Analog and digital JTAG
can also help reduce test costs by reducing
test times.
Alternate solutions require triple the PCB
space or more for an eight-channel 1+1 pro-
tection application. The superior digital JA is
designed for SONET/SDH applications, meets
CTR12/13 specification, and provides the con-
stant delay needed in Intel
HPS applications.
0
1-7
Hardware/Software Control (JTAG Interface)
CLKE
MCLK
LOS
RPOS
RCLK
RNEG
TPOS
TCLK
TNEG
JASEL
LOOP 0-7
MODE
JTAG
Serial/
Parallel
ports
TRING
TTIP
RTIP
RRING
Clock
Recovery
LOS
Pulse
Shaper
Jitter
Attenuator
RX or TX
path
Jitter
Attenuator
RX or TX
path
Analog
Loopbac
k
Digital
Loopbac
k
Remote Loopbac
k
G
.772
Monitor
Data
Slicer
Line
Driver
B8ZS/HDB3
Decoder
B8ZS/HDB3
Encoder
LXT384 Block Diagram
Order Number: 249024-002 Printed in USA/0501/3K/ASI/DC
Copyright 2001 Intel Corporation
For more information, visit the Intel Web site at:
developer.intel.com
UNITED STATES AND CANADA
Intel Corporation
Robert Noyce Building
2200 Mission College Blvd.
P.O. Box 58119
Santa Clara, CA 95052-8119
USA
EUROPE
Intel Corporation (UK) Ltd.
Pipers Way
Swindon
Wiltshire SN3 1RJ
UK
ASIA-PACIFIC
Intel Semiconductor Ltd.
32/F Two Pacific Place
88 Queensway, Central
Hong Kong, SAR
JAPAN
Intel Japan (Tsukuba HQ)
5-6
Tokodai Tsukuba-shi
300-2635 Ibaraki-ken
Japan
SOUTH AMERICA
Intel Semicondutores do Brasil LTDA
Av. Dr. Chucri Zaidan, 940-10 andar
04583-904 So Paulo, SP
Brazil
Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is
granted by this document. Except as provided in Intel's Terms and Conditions of Sale for such products, Intel assumes no liability whatsoever, and Intel disclaims any
express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to fitness for a particular purpose, merchantability, or
infringement of any patent, copyright, or other intellectual property right. Intel products are not intended for use in medical, life-saving or life-sustaining applications.
Intel may make changes to specifications and product descriptions at any time, without notice.
Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Intel reserves these for future definition and
shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them.
Intel is a trademark or registered trademark of Intel Corporation or its subsidiaries in the United States and other countries.
*Other names and brands may be claimed as the property of others.
Intel
Internet Exchange Architecture
Intel
Internet Exchange Architecture (IXA) is an end-to-end
family of high-performance, flexible and scalable hardware
and software development building blocks designed to
meet the growing performance requirements of today's
networks. Based on programmable silicon and software
building blocks, Intel
IXA solutions enable faster devel-
opment, more cost-effective deployment, and future
upgradability of network and communications systems.
Additional information can be found at www.intel.com/IXA.
Applications
s
SONET/SDH tributary interfaces
s
Digital cross connects
s
Public/private switching trunk line interfaces
s
Microwave transmission systems
s
M13 and E1-E3 multiplexer
Features
s
Intel
Hitless Protection Switching
s
Superior crystal-less JA
s
Nonintrusive performance monitor
s
3.3V supply with 5V-tolerant inputs
s
Analog and digital JTAG
s
15x15mm BGA package
Benefits
s
Helps eliminate expensive relays needed for 1+1
redundant applications
s
Meets ETSI CTR 12/13, ITU G.736, G.742,
G.823, and AT&T Pub62411 specifications
s
Optimized for SONET/SDH applications, meets ITU
G.783 mapping jitter specifications
s
Constant throughput delay jitter attenuator
s
Allows eavesdropping on other channels without
interrupting service
s
Easy integration and lower power consumption
s
Helps reduce test costs and increase coverage
s
Leads to higher integration, helps reduce PCB real
estate, and helps increase ports per card
Item
Support Products
Application Notes
Description
s
LXT384 Octal T1/E1 Transceiver Data Sheet
s
LXT384 Design Assistant
s
LXD384 --Evaluation Board for Octal T1/E1 Applications Developer Manual
s
LXT384/386/388 Frequently Asked Questions (FAQs)
s
Transformer Specification for Intel
Transceiver Applications
s
LXT380/381/384/386/388 Redundancy Applications
s
LXT380/384 Octal T1/E1 LIUs--Interfacing with the Transwitch Octal Framer
s
LXT384/386/388 Twisted Pair Interface--without Component Changes
s
Intel
Hitless Protection Switching Backup Board not Powered
Order Number
248994
248836
249214
249183
249133
249134
249136
249138
249143
Support Collateral/Tools
Intel Access
Developer Web Site
http://developer.intel.com
Intel
Internet Exchange Architecture Home Page
http://intel.com/IXA
Networking Components Home Page
http://developer.intel.com/design/network
Intel Literature Center
http://developer.intel.com/design/litcentr
(800) 548-4725 7 a.m. to 7 p.m. CST (U.S. and Canada)
International locations please contact your local sales office.
General Information Hotline
(800) 628-8686 or (916) 356-3104 5 a.m. to 5 p.m. PST
PDF 
ZIP