GS1574A Datasheet, PDF (1/16 Pages) Gennum Corporation – GS1574A HD-LINX-R II Adaptive Cable Equalizer

GS1574A HD-LINX® II
Adaptive Cable Equalizer
GS1574A Data Sheet
Features
• 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 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
• Single 3.3V power supply operation
• Operating temperature range: 0°C to +70°C
Applications
• SMPTE 292M and SMPTE 259M Coaxial Cable
Serial Digital Interfaces.
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.
MCLADJ
SDI
SDI
CABLE LENGTH ADJUSTOR
CARRIER DETECT
MUTE
EQUALIZER
DC RESTORE
OUTPUT
AGC
GS1574A Functional Block Diagram
CD
MUTE
BYPASS
SDO
SDO
33416 - 5 March 2006
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