GS1574A HD-LINX® II Adaptive Cable Equalizer
Features
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SMPTE 292M and SMPTE 259M compliant
Automatic cable equalization
Multi-standard operation from 143Mb/s to 1.485Gb/s
Supports DVB-ASI at 270Mb/s
Small footprint (4mm x 4mm)
Pb-free and RoHS compliant
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
Single 3.3V power supply operation
Operating temperature range: 0°C to +70°C
Description
The GS1574A is a second-generation high-speed BiCMOS
integrated circuit designed to equalize and restore signals
received over 75Ω co-axial cable.
The GS1574A is designed to support SMPTE 292M and
SMPTE 259M, and is optimized for performance at 270Mb/s
and 1.485Gb/s.
The GS1574A features DC restoration to compensate for
the DC content of SMPTE pathological test patterns.
A voltage programmable mute threshold (MCLADJ) is
included to allow muting of the GS1574A output when an
approximate selected cable length is reached for SMPTE
259M signals. This feature allows the GS1574A to
distinguish between low amplitude SD-SDI signals and
noise at the input of the device. The serial digital outputs of
the GS1574A may be forced to a mute state by applying a
voltage to the MUTE pin.
Power consumption is typically 215mW using a 3.3V
power supply. The GS1574A is lead-free, and the
encapsulation compound does not contain halogenated
flame retardant.
This component and all homogeneous subcomponents are
RoHS compliant.
Application
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SMPTE 292M and SMPTE 259M Coaxial Cable Serial
Digital Interfaces
MCLADJ
CABLE LENGTH ADJUSTOR
CARRIER DETECT
MUTE
CD
MUTE
BYPASS
SDI
SDI
EQUALIZER
DC RESTORE
OUTPUT
SDO
SDO
AGC
Figure A: GS1574A Functional Block Diagram
GS1574A HD-LINX® II Adaptive Cable Equalizer
Data Sheet
33416 - 10
August 2011
1 of 16
GENNUM [ GENNUM CORPORATION ]
