GS1524A Adaptive Cable Equalizer

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GS1524A Adaptive Cable Equalizer

Data Sheet

28852 - 5

June 2009

www.gennum.com

Features

• SMPTE 292M, SMPTE 344M and SMPTE 259M

compliant

•Automatic cable equalization

• Multi-standard operation from 143Mb/s to 1.485Gb/s

• Supports DVB-ASI at 270Mb/s

• Pb-free and RoHS Compliant

• Pin compatible with the GS9064 Cable Equalizer

• Manual bypass (useful for low data rates with slow

rise/fall times)

• Performance optimized for 270Mb/s and 1.485Gb/s

• Typical equalized length of Belden 1694A cable: 200m

at 1.485Gb/s, 350m at 270Mb/s

•50Ω differential output (with internal 50Ω pull-ups)

• Manual output mute or programmable mute based on

max cable length adjust

• Cable length indicator for SMPTE 259M inputs

• Single 3.3V power supply operation

• Operating temperature range: 0°C to +70°C

Applications

• SMPTE 292M, SMPTE 344M and SMPTE 259M Coaxial

Cable Serial Digital Interfaces.

Description

The GS1524A is a second-generation high-speed BiCMOS

integrated circuit designed to equalize and restore signals

received over 75Ω co-axial cable.

The GS1524A is designed to support SMPTE 292M, SMPTE

344M and SMPTE 259M, and is optimized for performance

at 270Mb/s and 1.485Gb/s.

The GS1524A features DC restoration to compensate for

the DC content of SMPTE pathological test patterns. The

device also incorporates a Cable Length Indicator (CLI) that

provides an indication of the amount of cable being

equalized for data rates up to 360Mb/s.

A voltage programmable mute threshold (MCLADJ) is

included to allow muting of the GS1524A output when an

approximate selected cable length is reached for SMPTE

259M signals. This feature allows the GS1524A to

distinguish between low amplitude SD-SDI signals and

noise at the input of the device.

The bidirectional CD/MUTE pin indicates the presence of a

valid signal at the input of the GS1524A in addition to

functioning as a mute control input. The outputs of the

GS1524A will be forced to a mute state when an invalid

input reference signal is applied to the input of the device

or the application layer sets the CD/MUTE pin HIGH. If the

application layer forces CD/MUTE LOW, the serial digital

output of the device will always be active.

Power consumption is typically 265mW using a 3.3V

power supply.

The GS1524A is Pb-free, and the encapsulation compound

does not contain halogenated flame retardant (RoHS

Compliant).