GS1524A(2005) 查看數據表（PDF） - Gennum -> Semtech

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GS1524A
(Rev.:2005)

HD-LINX®II Adaptive Cable Equalizer

Gennum -> Semtech 

GS1524A Data Sheet

4.4 Mute and Carrier Detect

In addition to the programmable mute output and cable length indicator, the

GS1524A includes a multi-function CD/MUTE bidirectional pin that provides the

following functions:

INPUT (MUTE)

Applying a HIGH INPUT to the CD/MUTE pin forces the GS1524A outputs to a

muted condition. The minimum voltage required to force the outputs to a muted

condition is listed in the DC electrical characteristics table. In this condition the

outputs will be latched to the last logic level present at the output to avoid signal

crosstalk.

Applying a LOW INPUT to the CD/MUTE pin will force the GS1524A outputs to

remain active regardless of the length of input cable and the voltage applied to the

MCLADJ pin. See the DC electrical characteristics table for voltage levels.

OUTPUT (CD)

When used as an OUTPUT, the CD/MUTE pin will indicate the presence of a valid

input signal. When CD/MUTE is LOW, a valid input signal has been detected at the

input of the device. When CD/MUTE is HIGH, the input signal is invalid. This pin

will indicate loss of carrier for data rates greater than 19Mb/s.

NOTE: The CD/MUTE pin is not functional in BYPASS mode.

28852 - 1 May 2005

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