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What is GS1524A?

This electronic component, produced by the manufacturer "Gennum Corporation", performs the same function as "Adaptive Cable Equalizer".


GS1524A Datasheet PDF - Gennum Corporation

Part Number GS1524A
Description Adaptive Cable Equalizer
Manufacturers Gennum Corporation 
Logo Gennum Corporation Logo 


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GS1524A Adaptive Cable Equalizer
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).
GS1524A Adaptive Cable Equalizer
Data Sheet
28852 - 5
June 2009
www.gennum.com
1 of 16

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GS1524A equivalent
1.2 GS1524A Pin Descriptions
Table 1-1: GS1524A Pin Descriptions
Pin Number
1
2, 15
3, 6, 11, 14
4, 5
7, 8
9
10
12, 13
16
Name
CLI
VCC
VEE
SDI, SDI
AGC+,
AGC-
BYPASS
MCLADJ
SDO, SDO
CD/MUTE
Timing
Type
Description
Analog
Analog
Analog
Analog
Analog
Not
Synchronous
Analog
Analog
Not
Synchronous
Output
Cable Length Indicator.
An analog voltage will be output proportional to the cable length
connected to the serial digital input.
NOTE: CLI is recommended for data rates up the 360Mb/s only.
Power
Most positive power supply connection.
Connect to +3.3V DC.
Power
Most negative power supply connection.
Connect to GND.
Input
Serial digital differential input.
– External AGC capacitor.
Connect pin 7 and pin 8 together through a 1uF capacitor.
Input
Forces the Equalizing and DC RESTORE stages into bypass mode
when HIGH. No equalization occurs in this mode.
Input
Maximum cable length adjust.
Adjusts the approximate maximum amount of cable to be equalized
(from 0m to the maximum cable length). The output is muted
(latched to the last state) when the maximum cable length is
achieved.
NOTE: MCLADJ is only recommended for data rates up to 360Mb/s.
Output
Equalized serial digital differential output.
Bidirectiona
l
STATUS SIGNAL OUTPUT / CONTROL SIGNAL INPUT
levels are LVCMOS/LVTTL compatible.
OUTPUT (CD):
Indicates the presence of a valid input signal. When the CD pin is
LOW, a valid input signal has been detected. When this pin is HIGH,
the input signal is invalid. If CD is set HIGH, the serial digital output
of the device will be forced to a steady state (latched to the last
state).
NOTE: This pin will indicate loss of carrier for data rates > 19Mb/s.
INPUT (MUTE):
When the MUTE pin is set HIGH by the application interface, the
serial digital output of the device will be forced to a steady state
(latched to the last state). When the MUTE pin is set LOW, the serial
digital output of the device will be active.
NOTE: The CD/MUTE pin is not functional when BYPASS is set HIGH.
GS1524A Adaptive Cable Equalizer
Data Sheet
28852 - 5
June 2009
5 of 16


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