Preliminary Data Sheet

12/11/01

B roa dcom Co rpo rat ion

Document

AC104X-DS00-405-R

Section 1: Functional Description

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Energy detect/power saving mode: Energy detect mode turns off the power to select internal circuitry when there is no

live network connected. Energy Detect (ED) circuit is always turned on to monitor if there is a signal energy present on

the media. The SMI circuitry is also powered on and ready to respond to any management transaction. The transmit

circuit still send out link pulses with minimum power consumption. If a valid signal is received from the media, the

device powers up and resumes normal transmit/receive operation. (Patent Pending)

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Reduced Transmit Drive Strength mode: Additional power saving can be gained at the PHY level by designing with

1.25:1 turns magnetic ratio and asserting the TP125 pin at reset.

The clock input must have a TTL clock oscillator measured at 50 MHz-100PPM.