LXT905
Universal 10BASE-T Transceiver with 3.3V Support
Datasheet
The LXT905 Universal 10BASE-T Transceiver is designed for IEEE 802.3 physical layer
applications. It provides, in a single CMOS device, all the active circuitry for interfacing most
standard 802.3 controllers to 10BASE- T media.
LXT905 functions include Manchester encoding/decoding, receiver squelch and transmit pulse
shaping, jabber, link integrity testing, and reversed polarity detection/correction. The LXT905
drives the 10BASE-T twisted-pair cable with only a simple isolation transformer using a single
3.3V or 5V power supply. Integrated filters simplify the design work required for FCC-
compliant EMI performance.
Applications
s
s
Cable Modems
Hub/Switched Dedicated LANs for
10BASE-T
s
s
Desktop 10BASE-T LAN adapter boards
USB to Ethernet Converters
Product Features
s
s
s
s
s
s
s
Transparent 3.3 V or 5 V operation
Integrated filters 鈥?Simplifies FCC
compliance
Integrated Manchester encoder/decoder
10BASE-T compliant transceiver
Automatic polarity correction
SQE enable/disable
Four LED drivers
s
s
s
s
s
Full duplex capability
Power-down mode with tristate
Available in 28-pin PLCC and 32-pin
LQFP packages
Commercial Temperature Range ( 0 to
+70潞C)
Extended Temperature Range (-40 to
+85潞C)
As of January 15, 2001, this document replaces the Level One document
LXT905 Universal 10BASE-T Transceiver with 3.3V Support Datasheet.
Order Number: 249271-001
January 2001