LXT908
Universal 3.3V 10BASE-T and AUI Transceiver
Datasheet
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
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Access devices (DSL, Cable Modems, and
Set-top Boxes)
Routers/Bridges/Switches/Hubs
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Telecom Backplane
USB to Ethernet Converters
Product Features
Functional Features
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Improved Filters - Simplifies FCC
Compliance
Integrated Manchester Encoder/Decoder
10BASE-T compliant Transceiver
AUI Transceiver
Supports Standard and Full-Duplex
Ethernet
Diagnostic Features
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Four LED Drivers
AUI/RJ-45 Loopback
Convenience Features
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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
