Intel
®
LXT972M Single-Port 10/100 Mbps
PHY Transceiver
Datasheet
The Intel
®
LXT972M Single-Port 10/100 Mbps PHY Transceiver 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). Both full and half-duplex operation at 10 Mbps and 100 Mbps is supported.
Operation mode can be set to auto-negotiation, parallel detection, or manual control. The device is
powered from a single 3.3V power supply.
Applications
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Combination 10BASE-T/100BASE-TX
Network Interface Cards (NICs)
Wireless access points
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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■
■
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3.3V Operation
IEEE 802.3-compliant 10BASE-T or
100BASE-TX with integrated filters
Auto-negotiation and parallel detection
MII interface with extended register
capability
Robust baseline wander correction
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■
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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
Integrated, programmable LED drivers
48-pin Low-profile Quad Flat Package
RESET_L
ADDR[1:0]
MDIO
MDC
Management /
Mode Select
Logic
Power Supply
Register Set
Clock
Generator
VCC
GND
REFCLK/XI
XO
TX_EN
TXD[3:0]
TX PCS
Manchester
10
Encoder
Parallel/Serial
Converter
Scrambler
100
& Encoder
Auto
Negotiation
Register
Set
OSP
Pulse
Shaper
+
TP
Driver
TP Out
TPOP
TPON
-
TX_CLK
LED/CFG[3:1]
JTAG
5
COL
Collision
Detect
Clock
Generator
Media
Select
OSP
Adaptive EQ with
Baseline Wander
Cancellation
100TX
TDI
TDO
TMS
TCK
TRST_L
+
-
TP In
TPIP
TPIN
RX_CLK
RXD[3:0]
RX P CS
RX_DV
CRS
RX_ER
Serial-to-
Parallel
Carrier Sense Converter
Data Valid
Error Detect
10
100
Manchester
Decoder
Decoder &
Descrambler
OSP
Slicer
10BT
+
-
B3387-13
Document Number: 302875-005
Revision Date: 27-Oct-2005
INTEL [ INTEL CORPORATION ]
