Revision History
Version
Date
Changes and/or Modifications
5
November 2009
Updated to latest Gennum template and changed from
document number 52023 to 6926.
4
3
2
1
July 2004
Added lead-free and green information.
Revisions made.
–
–
Revisions made.
March 1991
New document.
Contents
Features.................................................................................................................................................................1
Application Selection Chart ...........................................................................................................................1
Description...........................................................................................................................................................1
Revision History .................................................................................................................................................2
1. Pin Connections .............................................................................................................................................3
1.1 Pin Connections ................................................................................................................................3
2. Electrical Characteristics ............................................................................................................................4
2.1 GS1881 Electrical Characteristics ...............................................................................................4
2.2 GS4881 Electrical Characteristics ...............................................................................................5
2.3 GS4981 Electrical Characteristics ...............................................................................................6
2.4 Typical Performance Characteristics .........................................................................................8
3. Temperature Characteristics .................................................................................................................. 11
4. Circuit Description..................................................................................................................................... 14
4.1 Composite Video Input (Pin 2) and Composite Sync Output (Pin 1) ............................. 14
4.2 Back Porch Output (Pin 5) ........................................................................................................... 15
4.3 Vertical Sync Output (Pin 3) ....................................................................................................... 16
4.4 Odd/Even Field Output (Pin 7 GS1881, GS4881) ................................................................ 16
4.5 Horizontal Output (Pin 7 GS4981) ............................................................................................ 17
4.6 Block Diagrams .............................................................................................................................. 17
5. Application Notes....................................................................................................................................... 20
5.1 Choosing the Appropriate Input Capacitor to Optimize Slicing Level and
Hum Rejection ....................................................................................................................................... 20
5.2 Filtering ............................................................................................................................................. 22
5.3 Deriving Odd/Even Using the GS4981 ................................................................................... 25
6. Ordering Information................................................................................................................................ 27
6.1 GS1881 Ordering Information .................................................................................................. 27
6.2 GS4881 Ordering Information .................................................................................................. 27
6.3 GS4981 Ordering Information .................................................................................................. 28
GS1881, GS4881, GS4981 Monolithic Video Sync
2 of 29
Separators
Data Sheet
Proprietary & Confidential
6926 - 5
November 2009
GENNUM [ GENNUM CORPORATION ]
