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GS4901B

Part Number	GS4901B
Manufacturer	Gennum
Description	SD Clock and Timing Generator
Published	Sep 28, 2016
Detailed Description	GS4901B/GS4900B SD Clock and Timing Generator with GENLOCK Key Features Video Clock Synthesis • Pre-programmed for 4 vi...
Datasheet	GS4901B PDF File

Overview

GS4901B/GS4900B SD Clock and Timing Generator with GENLOCK Key Features Video Clock Synthesis • Pre-programmed for 4 video clock periods (14.
32 MHz, 27 MHz, 36 MHz, and 54 MHz) • Accuracy of free-running clock frequency limited only by crystal reference • One differential and two single-ended video clock outputs • Each clock may be individually delayed for skew control • Video output clock may be directly connected to Gennum’s serializers for a SMPTE-compliant SDI output Audio Clock Synthesis (GS4901B only) • Three audio clock outputs • Generates any audio clock up to 512*96kHz • Pre-programmed for 7 audio clocks Timing Generation • Generates up to 8 timing signals at a time • Choose from 9 pre-programmed timing signals: H and V sync and blanking, F Sync, F Digital, AFS (GS4901B only), Display Enable, 10FID, and up to 4 user-defined timing signals • Pre-programmed to generate timing for 9 different video formats Genlock Capability • Clocks may be free-running or genlocked to an input reference with a variable offset step size of 100-200ps (depending on exact clock frequency) • Variable timing offset step size of 100-200ps up to one frame • Output may be cross-locked to a different input reference • Freeze operation on loss of reference • Optional crash or drift lock on application of reference • Automatic input format detection General Features • Reduces design complexity and saves board space - 9mm x 9mm package plus crystal reference replaces multiple VCXOs, PLLs and timing generators • Pb-free and RoHS Compliant • Low power operation typically 300mW • 1.
8V core and 1.
8V or 3.
3V I/O power supplies • 64-PIN QFN package Applications • Video cameras; Digital audio and/or video recording/play back devices; Digital audio and/or video processing devices; Computer/video displays; DVD/MPEG devices; Digital Set top boxes; Video projectors; High definition video systems; Multi-media PC applications Description The GS4901B is a highly flexible, digitally controlled clock s...

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