GENERAL DESCRIPTION

The ML6430/ML6431 are multi-standard single-chip BiCMOS video Genlock ICs for NTSC, PAL and VGA.

They are designed to provide a stable clock from an analog video signal, and to provide timing pulses for clamping, decoding, blanking and processing video signals. The ML6430/ML6431 handle VCR glitches and variations created by head switching, tape dropouts, missing sync pulses, freeze frames, high speed playback and camcorder gyro errors.

FEATURES

■Line locked scalable horizontal pixel clock for an arbitrary number of pixels per line

■Standard frequencies of 12.27, 13.5, 14.75MHz, or 4Fsc

■4´/2´or 2´/1´clock outputs (54 and 27MHz, or 27 and 13.5MHz) and VGA clocks

■Audio clocks: 32, 44.1, or 48kHz, locked to video

■On-chip sync separator, VCO and pulse generator

■Low clock jitter: Short Term: <200ps rms locked

■Line to line: <600ps rms (2.2ns peak-to-peak) locked

■Fast recovery from VCR head switch, stable for fast shuttle speeds and pause

■Single crystal or external frequency source

■PAL, NTSC or VGA operation

■2 wire serial control bus, or selectable presets for stand alone operation

■RS170A compatible