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DJLXT971ALE.A4

3.3V Dual-Speed Fast Ethernet PHY Transceiver

Intel 

Intel® LXT971A

3.3V Dual-Speed Fast Ethernet PHY Transceiver

Datasheet

The LXT971A is an IEEE compliant Fast Ethernet PHY Transceiver that directly supports both

100BASE-TX and 10BASE-T applications. It provides a Media Independent Interface (MII) for

easy attachment to 10/100 Media Access Controllers (MACs). The LXT971A also provides a

Low Voltage PECL (LVPECL) interface for use with 100BASE-FX fiber networks.

This document also supports the LXT971 device.

The LXT971A supports full-duplex operation at 10 Mbps and 100 Mbps. Its operating condition

can be set using auto-negotiation, parallel detection, or manual control.

The LXT971A is fabricated with an advanced CMOS process and requires only a single 3.3V

power supply.

Applications

■ Combination 10BASE-T/100BASE-TX or ■ 10/100 PCMCIA Cards

100BASE-FX Network Interface Cards

(NICs)

■ Cable Modems and Set-Top Boxes

Product Features

■ 3.3V Operation.

■ Low power consumption (300 mW

typical).

■ Low-power “Sleep” mode.

■ 10BASE-T and 100BASE-TX using a

single RJ-45 connection.

■ Supports auto-negotiation and parallel

detection.

■ MII interface with extended register

capability.

■ Robust baseline wander correction

performance.

■ 100BASE-FX fiber-optic capable.

■ Standard CSMA/CD or full-duplex

operation.

■ Supports JTAG boundary scan.

■ Configurable via MDIO serial port or

hardware control pins.

■ Integrated, programmable LED drivers.

■ 64-ball Plastic Ball Grid Array (PBGA).

— LXT971ABC - Commercial (0° to

70°C ambient).

— LXT971ABE - Extended (-40° to 85°C

ambient).

■ 64-pin Low-profile Quad Flat Package

(LQFP).

— LXT971ALC - Commercial (0° to

70°C ambient).

— LXT971ALE - Extended (-40° to 85°C

ambient).

Order Number: 249414-002

August 2002

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