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GS4900B Datenblatt(PDF) 4 Page - Gennum Corporation

Teilenummer GS4900B
Bauteilbeschribung  SD Clock and Timing Generator with GENLOCK
Download  102 Pages
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Hersteller  GENNUM [Gennum Corporation]
Direct Link  http://www.gennum.com
Logo GENNUM - Gennum Corporation

GS4900B Datenblatt(HTML) 4 Page - Gennum Corporation

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GS4901B/GS4900B SD Clock and Timing Generator
with GENLOCK
Data Sheet
37703 - 4
December 2009
4 of 102
Contents
Key Features........................................................................................................................................................1
Applications.........................................................................................................................................................1
Description...........................................................................................................................................................1
1. Pin Out...............................................................................................................................................................7
1.1 GS4901B Pin Assignment ...............................................................................................................7
1.2 GS4900B Pin Assignment ...............................................................................................................8
1.3 Pin Descriptions ................................................................................................................................9
1.4 Pre-Programmed Recognized Video Standards .................................................................. 19
1.5 Output Timing Signals ................................................................................................................. 23
2. Electrical Characteristics ......................................................................................................................... 27
2.1 Absolute Maximum Ratings ....................................................................................................... 27
2.2 DC Electrical Characteristics ..................................................................................................... 27
2.3 AC Electrical Characteristics ..................................................................................................... 31
2.4 Solder Reflow Profiles .................................................................................................................. 34
3. Detailed Description.................................................................................................................................. 35
3.1 Functional Overview .................................................................................................................... 35
3.2 Modes of Operation ...................................................................................................................... 35
3.2.1 Genlock Mode..................................................................................................................... 35
3.2.2 Free Run Mode ................................................................................................................... 39
3.3 Output Timing Format Selection .............................................................................................. 40
3.4 Input Reference Signals ............................................................................................................... 41
3.4.1 HSYNC, VSYNC, and FSYNC.......................................................................................... 41
3.4.2 10FID ..................................................................................................................................... 42
3.4.3 Automatic Polarity Recognition ................................................................................... 42
3.5 Reference Format Detector ........................................................................................................ 43
3.5.1 Horizontal and Vertical Timing Characteristic Measurements ......................... 43
3.5.2 Input Reference Validity................................................................................................. 44
3.5.3 Behaviour on Loss and Re-acquisition of the Reference Signal......................... 45
3.5.4 Allowable Frequency Drift on the Reference .......................................................... 47
3.6 Genlock ............................................................................................................................................. 47
3.6.1 Adjustable Locking Time................................................................................................. 49
3.6.2 Adjustable Loop Bandwidth .......................................................................................... 49
3.6.3 Locking to Digital Timing from a Deserializer ......................................................... 52
3.7 Clock Synthesis .............................................................................................................................. 52
3.7.1 Video Clock Synthesis...................................................................................................... 52
3.7.2 Audio Clock Synthesis (GS4901B only)...................................................................... 54
3.8 Video Timing Generator .............................................................................................................. 58
3.8.1 10 Field ID Pulse................................................................................................................. 58
3.8.2 Audio Frame Synchronizing Pulse (GS4901B only)............................................... 59
3.8.3 USER_1~4............................................................................................................................. 60
3.8.4 TIMING_OUT Pins ............................................................................................................. 62
3.9 Extended Audio Mode for HD Demux using the Gennum Audio Core ...................... 63


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