GS1524A Datasheet, PDF (1/16 Pages) Semtech Corporation – Adaptive Cable Equalizer

GS1524A HD-LINX^®II
Adaptive Cable Equalizer
GS1524A Data Sheet
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 maximum equalized length of Belden
1694A cable: 140m 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
bipolar 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).
28852 - 1 May 2005
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