Management/
Mode Select
Logic
Register Set
Parallel/Serial
Converter
Carrier
Sense
Data Valid
Error Detect
Serial to
Parallel
Converter
OSP
Slicer
OSP
Pulse
Shaper
OSP
Slicer
Power
Supply
TX PCS
RX PCS
Scrambler
& Encoder
Register
Set
TP/
Fiber
In
TP/
Fiber
Out
JTAG
Auto
Negotiation
Clock
Generator
Clock
Generator
Media
Select
Collision
Detect
Manchester
Encoder
RESET
ADDR<4:0>
MDIO
MDC
MDINT
MDDIS
VGC
GND
PWRDWN
TDI
TDO
TMS
TCK
TRST
TPFIP
TPFIN
SD/TP
REFCLK
TxSLEW<1:0>
TPFOP
TPFON
RDX<4:0>
RXDV
CRS
RX_ER
TX_EN
TXD<4:0>
TX_ER
TX_CLK
LED/CFG<3:1>
COL
RX_CLK
+
+
+
+
+
10
100
Decoder &
Unscrambler
Manchester
Dencoder
10
100
TP
Driver
ECL
Driver
100TX
100FX
10BT
Intel
LXT971A
Dual-speed 3.3V 10/100 Ethernet Transceiver
With Intel
Carrier Class Ethernet Support
Product Description
High-performance network applications that
demand lower power are growing rapidly in
today's marketplace. Intel, a leading provider of
Ethernet silicon solutions, has enhanced the
commitment to its Ethernet product family with
its latest 10/100 Fast Ethernet transceiver. The
Intel
LXT971A is a next-generation low-power,
single-port PHY with significantly expanded
Cable Discharge Event (CDE) protection.
Revolutionary design techniques incorporate
Intel's Optimal Signal Processing (OSP)
architecture, an ideal combination of digital
signal processing and analog design techniques
designed for die size, power consumption,
performance, reliability, and testability.
Applications
Low-power, dual-speed network applications
for the LXT971A transceiver include: network
interface cards (NICs), PCMCIA cards, cable
modems, set-top boxes and IP phones.
The LXT971A includes an MII with extended
register capability and an optional 2.5V power
supply interface for additional power savings.
For 100BASE-FX fiber networks, the LXT971A
is designed with a pseudo-ECL (PECL) interface
for seamless integration with common industry-
standard fiber modules.
Innovative Packaging
Intel delivers the LXT971A in a 7mm x 7mm
plastic ball grid array (PBGA) packaging. This
revolutionary package helps save board space
and is available in the popular industrial
temperature range that is ideal for network
applications in extreme thermal environments.
For flexibility in very low-power applications, the
LXT971A offers a Sleep mode in addition to
two Power Down modes. When the LXT971A
detects an absence of energy on the twisted-
pair input, it minimizes power consumption by
shutting down the transmitter and placing the
receiver in low-power mode.
Intel Carrier Class Ethernet
Many networking and telecom applications
require high-performance Ethernet
components capable of operating under harsh
environmental conditions. Intel
Carrier Class
Ethernet products support operation over the
entire extended temperature range while
providing features that increase reliability. Each
device has an operation lifetime of at least 10
years with less than 100 failures per billion
hours. All Intel Carrier Class Ethernet devices
will be available a minimum of 5 years from
product introduction.
The Intel Carrier Class Ethernet product
portfolio includes solutions for Ethernet
physical layer, switching and repeater
technologies at a variety of speeds. Intel
Carrier Class Ethernet products are ideal for
applications where equipment must function
reliably in uncontrolled environmental
conditions such as base stations,
telecom/network switches, factory floor
equipment, and industrial computers.
product brief
LXT971A Block Diagram
Intel
Internet Exchange
Architecture
Product
Package
Temperature
Identifier
Range
L
LX
XT
T9
97
71
1A
AB
BC
C
64-pin PBGA
Commercial
0C to +70C
L
LX
XT
T9
97
71
1A
AB
BE
E
64-pin PBGA
Extended
-40C to +85C
L
LX
XT
T9
97
71
1A
AL
LC
C
64-pin LQFP
Commercial
0C to +70C
L
LX
XT
T9
97
71
1A
AL
LE
E
64-pin LQFP
Extended
-40C to +85C
Features
Benefits
s
Helps lower power consumption
s
Provides small-profile packaging
s
Enables industrial applications
s
Helps minimize power consumption
s
Complies with industry standards
Additional power savings
s
Helps improve data recovery and EMI performance
s
Provides consistent, error-free performance
s
Enables transfer of additional information during
auto-negotiation
s
Provides 100BASE-FX fiber-optic capability
s
Enables flexible network monitoring
s
Allows simultaneous transmit and receive
s
Enables board-level testing of the LXT971A
s
3.3V power supply
s
64-pin, 7mm x 7mm PBGA package
s
-40C to +85C temperature testing
s
Sleep mode
s
MII interface
2.5V MII interface option
s
Optimal Signal Processing
s
Baseline Wander Correction
s
Next Page Exchange
s
PECL interface
s
Programmable LED drivers
s
10/100Mbps full-duplex operation
s
Boundary scan (JTAG) test port
Order Number: 248913-003 Printed in USA/0301/SB
Intel
Internet Exchange Architecture
Copyright 2001 Intel Corporation
Intel Access
Developer's Site
developer.intel.com
Intel Internet Exchange Architecture Home Page
www.intel.com/IXA
Networking Components Home Page
developer.intel.com/design/network
Other Intel Support:
developer.intel.com/design/litcentr
Intel Literature Center
(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
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
Rua Florida, 1703-2 and CJ 22
04565-001 Sao 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.
* Other names and brands may be claimed as the property of others.
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
development, more cost-effective deployment, and future
upgradability of network and communications systems.
Additional information can be found at ww.intel.com/IXA.
LXT971A Product Family
PDF 
ZIP