ETC LXT971ALC

product brief
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 industrystandard 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
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.
LXT971A Block Diagram
RESET
ADDR<4:0>
MDIO
MDC
MDINT
MDDIS
VGC
GND
PWRDWN
Power
Supply
Management/
Mode Select
Logic
Clock
Generator
Register Set
REFCLK
TxSLEW<1:0>
Manchester
Encoder
10
Scrambler
& Encoder
100
TX PCS
TX_EN
TXD<4:0>
TX_ER
TX_CLK
Parallel/Serial
Converter
OSP
Pulse
Shaper
TP
Driver
+
–
TP/
Fiber
Out
+
ECL
Driver
COL
OSP
Slicer
Clock
Generator
Collision
Detect
RX_CLK
RDX<4:0>
RXDV
CRS
RX_ER
JTAG
Register
Set
LED/CFG<3:1>
Serial to
Parallel
Converter
Carrier
Sense
Data Valid
Error Detect
Media
Select
100
Manchester
Dencoder
Decoder &
Unscrambler
OSP
Slicer
TPFON
+
TDI
TDO
TMS
TCK
TRST
100TX
–
+
10
TPFOP
–
Auto
Negotiation
RX PCS
Intel
Internet Exchange
Architecture
®
LXT971A offers a Sleep mode in addition to
two Power Down modes. When the LXT971A
detects an absence of energy on the twistedpair input, it minimizes power consumption by
shutting down the transmitter and placing the
receiver in low-power mode.
100FX
–
+
10BT
–
TP/
Fiber
In
TPFIP
TPFIN
SD/TP
Features
Benefits
■
3.3V power supply
■
Helps lower power consumption
■
64-pin, 7mm x 7mm PBGA package
■
Provides small-profile packaging
■
- 40ºC to +85ºC temperature testing
■
Enables industrial applications
■
Sleep mode
■
Helps minimize power consumption
■
MII interface
– 2.5V MII interface option
■
Complies with industry standards
– Additional power savings
■
Optimal Signal Processing
■
Helps improve data recovery and EMI performance
■
Baseline Wander Correction
■
Provides consistent, error-free performance
■
Next Page Exchange
■
Enables transfer of additional information during
auto-negotiation
■
PECL interface
■
Provides 100BASE-FX fiber-optic capability
■
Programmable LED drivers
■
Enables flexible network monitoring
■
10/100Mbps full-duplex operation
■
Allows simultaneous transmit and receive
■
Boundary scan (JTAG) test port
■
Enables board-level testing of the LXT971A
LXT971A Product Family
Intel® Internet Exchange Architecture
Product
Identifier
LXT971ABC
Package
64-pin PBGA
LXT971ABE
64-pin PBGA
LXT971ALC
64-pin LQFP
LXT971ALE
64-pin LQFP
Temperature
Range
Commercial
0°C to +70°C
Extended
-40°C to +85°C
Commercial
0°C to +70°C
Extended
-40°C to +85°C
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.
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:
Intel Literature Center
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
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