GS1524A Adaptive Cable Equalizer
Features
Description
•
SMPTE 292M, SMPTE 344M and SMPTE 259M
compliant
•
Automatic cable equalization
The GS1524A is a second-generation high-speed BiCMOS
integrated circuit designed to equalize and restore signals
received over 75Ω co-axial cable.
•
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.
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).
GS1524A Adaptive Cable Equalizer
Data Sheet
28852 - 5
June 2009
www.gennum.com
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