TMC2072

The TMC2072 Genlocking Video Digitizer samples and quantizes standard analog baseband composite NTSC or PAL video into its 8-bit digital equivalent. It extracts horizontal and vertical sync signals, from which an on-chip PLL generates a line-locked pixel clock for the on-chip 8-bit A/D converter and a double-speed register clock to transfer data to a subsequent video processing subsystem. A second PLL generates a chroma subcarrier locked to the incoming chroma burst. The chip reports each line's color burst phase and frequency during the next horizontal sync pulse.

The TMC2072 includes a three-channel video input multi-plexer, analog clamp, variable gain amplifier, and digital back porch clamp. The user may provide ither an external 20MHz clock or a 20MHz crystal. No external component changes or tuning are required for PAL or NTSC operation at either D1 or square pixel VGA pixel rates.

The TMC2072 is fabricated in a submicron CMOS process and is packaged in a 100-lead MQFP. Its performance is guaranteed from 0 to 70°C.