FALXT972MCCA4 datasheet(59/92 Pages) INTEL

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Intel

® LXT972M Single-Port 10/100 Mbps PHY Transceiver

Datasheet

Document Number: 302875-005

Revision Date: 27-Oct-2005

Figure 20 shows the LXT972M Transceiver in a typical twisted-pair interface, with the RJ-45

connections configured for a NIC application.

Figure 20. Intel

® LXT972M Transceiver Typical Twisted-Pair Interface - NIC

1. Center tap current may be supplied from 3.3 V VCCA as shown. Additional power savings may be

realized by supplying the center tap from a 2.5 V current source. A separate ferrite bead (rated at 50

mA) should be used to supply center-tap current.

2. The 100

Ω transmit load termination resistor typically required is integrated in the LXT972M

Transceiver.

3. Magnetics without a receive pair center tap do not require a 2 kV termination.

4. RJ-45 connections shown for standard NIC. TX/RX crossover may be required for repeater and

switch applications.

TPIP

TPIN

* = 0.001

μF / 2.0 kV

1:1

Intel®

LXT972M

Transceiver

1:1

TPOP

TPON

VCCA

GND

0.1

μF

.01

μF

270 pF 5%

0.01

μF

Ω 1%

SD/TP_L

RJ-45

0.1

μF

B3513-01

FALXT972MCCA4 データシート(PDF) 59 Page - Intel Corporation

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