Intel® LXT971A Single-Port 10/100 Mbps
PHY Transceiver
Datasheet
The Intel® LXT971A Single-Port 10/100 Mbps PHY Transceiver (called hereafter the LXT971A
Transceiver) 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 Transceiver is IEEE compliant, and provides a Low Voltage Positive
Emitter Coupled Logic (LVPECL) interface for use with 100BASE-FX fiber networks. (This
document also supports the Intel® LXT971 Transceiver.) The LXT971A Transceiver supports
full-duplex operation at 10 Mbps and 100 Mbps. Operating conditions for the LXT971A
Transceiver can be set using auto-negotiation, parallel detection, or manual control. The
LXT971A Transceiver is fabricated with an advanced CMOS process and requires only a single
2.53.3 V power supply.
Applications
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Combination 10BASE-T/100BASE-TX or
100BASE-FX Network Interface Cards
(NICs)
Network printers
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10/100 Personal Computer Memory Card
International Association (PCMCIA) cards
Cable Modems and Set-Top Boxes
Product Features
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3.3 V Operation
Low power consumption (300 mW typical)
Low-power “Sleep” mode
10BASE-T and 100BASE-TX using a
single RJ-45 connection
IEEE 802.3-compliant 10BASE-T or
100BASE-TX ports with integrated filters
Auto-negotiation and parallel detection
MII interface with extended register
capability
Robust baseline wander correction
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Carrier Sense Multiple Access / Collision
Detection (CSMA/CD) or full-duplex
operation
JTAG boundary scan
MDIO serial port or hardware pin
configurable
100BASE-FX fiber-optic capable
Integrated, programmable LED drivers
— 64-ball Plastic Ball Grid Array (PBGA)
or 64-pin Quad Flat Package (LQFP)
— LXT971ABC - Commercial (0° to 70
°C ambient).
— LXT971ABE - Extended (-40° to
85 °C ambient).
— LXT971ALC - Commercial (0° to
70 °C ambient).
— LXT971ALE - Extended (-40° to
85 °C ambient).
Document Number: 249414-003
Revision Date: 25-Oct-2005
