TMC22091

• All-digital video encoding
• Internal digital oscillators, no crystals required
• Multiple input formats supported
  24-bit and 15-bit GBR/RGB
  YCBCR422 or 444
  Color indexed
• 30 overlay colors (TMC22191)
• Fully programmable timing
• Supports input pixel rates of 10 to 15 Mpps
• 256 x 8 x 3 color look-up tables (bypassable on TMC22191)
• 8-bit mask register
• 8-bit composite digital video input
• Hardware and 24-bit data keying
• Synchronizes with TMC22071 Genlocking Video Digitizer
• 8:8:8 video reconstruction
• SMPTE 170M NTSC or CCIR Report 624 PAL compatible
• Supports PAL-M and NTSC without pedestal
• Simultaneous S-VIDEO (Y/C) NTSC/PAL output
• 10-bit D/A conversion (three channels)
• Controlled edge rates
• 3 power-down modes
• Built-in color bars and modulated ramp test signals
• JTAG (IEEE Std 1149.1-1990) test interface
• Single +5V power supply
• 84 lead PLCC package
• 100 lead MQFP package

The TMC22091 digital video encoders convert digital com-puter image or graphics data (in RGB, YCBCR, or color indexed format) or a CCIR-601 signal into a standard analog baseband television (NTSC or PAL) signal with a modulated color subcarrier.

Both composite (single lead) and S-VIDEO (separate chroma and luma) formats are active simultaneously at the three analog output pins, each of which enerates a standard video-level signal into doubly-terminated 75Ω load.

The TMC22091 accepts digitized video from the companion TMC22071 Genlocking Video Digitizer. Soft switching between video sources is done under either hardware or programmable data control.

The TMC22091 offers 4-layer keying capability, bypassable CLUT, and 30 Overlay colors.

The TMC22091 is fabricated in a submicron CMOS process and packaged in an 84 Lead Plastic Leadless Chip Carrier, or in a 100 Lead Metric Quad Flat Pack. Performance is guar-anteed from 0°C to 70°C.