CD22402

Semiconductor May 1999 CT T ODU CEMEN 7 R P E A 74 T L 7 E OL REP 00-442OBS ENDED 8 1 m s.co MM ions ECO pplicat p@harri R O N ral A centap Sync Cent : Call or email CD22402 Generator for TV Applications and Video Processing Systems Features Interlaced Composite Sync Output Automatic Genlock Capability Crystal Oscillator Operation 525 or 625 Line Operation Vertical Reset Option Wide Power Supply Operating Voltage . . . . . 4V to 15V Description The Harris CD22402 (Note) is a CMOS LSI sync generator that produces all the timing signals required to drive a fully 2-to-1 interlaced 525-line 30-frame/second, or 625-line 25-frame/second TV camera or video processing system. A complete sync waveform is produced which begins each field with six serrated vertical sync pulses, preceded and followed by six half-width double frequency equalizing pulses. The sync output is gated by the master clock to preserve horizontal phase continuity during the vertical interval. The CD22402 can be operated either in “genlock” mode, in which it is synchronized with a reference sync pulse train from another TV camera, or in “stand-alone” mode, in which it is synchronized with a local on-chip crystal oscillator (the crystal and two passive components are off chip). Also, the circuit can sense the presence or absence of a reference sync pulse train and automatically select the “genlock” or “stand-alone” mode. A frame sync pulse is produced at the beginning of every odd field. The vertica...