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Gennum Corporation

GS1574 Datasheet Preview

GS1574 Datasheet

HD-LINX -TM II Adaptive Cable Equalizer

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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
• Small footprint (4mm x 4mm)
• Pb-free and Green
• Pin compatible with the GS9074 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
• 50differential output (with internal 50pull-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, SMPTE 344M and SMPTE 259M Coaxial
Cable Serial Digital Interfaces.
GS1574 HD-LINX ™ II
Adaptive Cable Equalizer
GS1574 Preliminary Data Sheet
Description
The GS1574 is a second-generation high-speed bipolar
integrated circuit designed to equalize and restore
signals received over 75co-axial cable.
The GS1574 is designed to support SMPTE 292M,
SMPTE 344M and SMPTE 259M, and is optimized for
performance at 270Mb/s and 1.485Gb/s.
The GS1574 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 GS1574 output when an
approximate selected cable length is reached for
SMPTE 259M signals. This feature allows the GS1574
to distinguish between low amplitude SD-SDI signals
and noise at the input of the device. The serial digital
outputs of the GS1574 may be forced to a mute state by
applying a voltage to the MUTE pin.
Power consumption is typically 270mW using a 3.3V
power supply. The GS1574 is lead-free, and the
encapsulation compound does not contain halogenated
flame retardant.
MCLADJ
SDI
SDI
CABLE LENGTH ADJUSTOR
CARRIER DETECT
MUTE
EQUALIZER
DC RESTORE
OUTPUT
MUTE
BYPASS
SDO
SDO
AGC
GS1574 Functional Block Diagram
Proprietary and Confidential 28854 - 2 December 2004
1 of 17
www.gennum.com




Gennum Corporation

GS1574 Datasheet Preview

GS1574 Datasheet

HD-LINX -TM II Adaptive Cable Equalizer

No Preview Available !

Contents
GS1574 Preliminary Data Sheet
Features ........................................................................................................................1
Applications ...................................................................................................................1
Description ....................................................................................................................1
1. Pin Out ......................................................................................................................3
1.1 GS1574 Pin Assignment .................................................................................3
1.2 GS1574 Pin Descriptions ................................................................................4
2. Electrical Characteristics ...........................................................................................5
2.1 Absolute Maximum Ratings ............................................................................5
2.2 DC Electrical Characteristics ..........................................................................5
2.3 AC Electrical Characteristics ...........................................................................6
2.4 Solder Reflow Profiles .....................................................................................7
3. Input / Output Circuits ...............................................................................................9
4. Detailed Description ................................................................................................11
4.1 Serial Digital Inputs .......................................................................................11
4.2 Cable Equalization ........................................................................................11
4.3 Programmable Mute Output ..........................................................................12
4.4 Mute ..............................................................................................................12
5. Application Information............................................................................................13
5.1 PCB Layout ...................................................................................................13
5.2 Typical Application Circuit A .........................................................................13
5.3 Typical Application Circuit B .........................................................................14
6. Package & Ordering Information .............................................................................15
6.1 Package Dimensions ....................................................................................15
6.2 Land Information ...........................................................................................16
6.3 Packaging Data .............................................................................................16
6.4 Ordering Information .....................................................................................16
7. Revision History ......................................................................................................17
Proprietary and Confidential 28854 - 2 December 2004
2 of 17


Part Number GS1574
Description HD-LINX -TM II Adaptive Cable Equalizer
Maker Gennum Corporation
Total Page 17 Pages
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