The LXT908 Universal 10BASE-T and AUI Transceiver is designed for IEEE 802.3 physical
layer applications. It provides all the active circuitry to interface most standard 802.3 controllers
to either the 10BASE-T media or Attachment Unit Interface (AUI). In addition to standard 10
Mbps Ethernet, the LXT908 also supports full-duplex operation at 20 Mbps.
LXT908 functions include Manchester encoding/decoding, receiver squelch and transmit pulse
shaping, jabber, link testing and reversed polarity detection/correction. The LXT908 can be used
to drive either the AUI drop cable or the 10BASE-T twisted-pair cable with only a simple
isolation transformer. Integrated filters simplify the design work required for FCC-compliant
EMI performance.
The LXT908 is fabricated with an advanced CMOS process and requires only a single 3.3V
power supply.
Applications
s
s
Access devices (DSL, Cable Modems, and
Set-top Boxes)
Routers/Bridges/Switches/Hubs
s
s
Telecom Backplane
USB to Ethernet Converters
Product Features
Functional Features
s
s
s
s
s
Convenience Features
s
s
s
s
s
s
s
s
Improved Filters - Simplifies FCC
Compliance
Integrated Manchester Encoder/Decoder
10BASE-T compliant Transceiver
AUI Transceiver
Supports Standard and Full-Duplex
Ethernet
Diagnostic Features
s
s
Four LED Drivers
AUI/RJ-45 Loopback
Automatic/Manual AUI/RJ-45 Selection
Automatic Polarity Correction
SQE Disable/Enable function
Power Down Mode with tri-stated outputs
Four loopback modes
Single 3.3V operation
Available in 64-pin LQFP and 44-pin
PLCC package
Commercial (0 to +70°C) and
Extended (-40 to +85°C) temperature range
For technical assistance on this product, please call 1-800-628-8686, or
send an e-mail to
support@mailbox.intel.com.
Order Number: 249049-002
June 2001
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.
The LXT908 may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current
characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature may be obtained by calling
1-800-548-4725 or by visiting Intel’s website at http://www.intel.com.
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