BA7242F

Multimedia ICs Color TV signal encoder BA7242F The BA7242F is an IC which converts analog RGB signals to NTSC and PAL color TV signals. In addition to composite output, luminance output, chrominance output, and analog RGB output are available. Each type of output is equipped with an internal 75Ω driver. Applications TV peripheral devices Features 1) Supports both NTSC and PAL systems. 2) Internal flip-flop circuit for PAL common mode switching 3) Equipped with Y / C separated output pin. 4) Internal 75Ω driver 5) Supports subcarrier pulse for color input Block diagram SYNC BIN 1 CLAMP MATRIX BFP GIN 2 CLAMP BFP RIN 3 CLAMP BFP B-Y MOD VCC1 4 GND VCC 11 GND2 SYNC MIX VCC 14 VCC2 13 YOUT Y/C MIX 12 VOUT SYNC 5 CHROMA GEN SYNC 10 COUT BURST FLAG R-Y MOD BFP 6 FF 9 NT / PAL NT / PAL GND NT / PAL FILTER PHASE GEN GND1 7 8 SCIN 1 Multimedia ICs BA7242F Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 7 450∗ – 20 ~ + 70 – 55 ~ + 125 Unit V mW °C °C ∗ Reduced by 4.5mW for each increase in Ta of 1°C over 25°C. (When mounted on a 70mm × 70mm × 1.6mm glass epoxy board.) Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage RIN input level GIN input level BIN input level SCIN input level Symbol VCC υRI υGI υBI υSC Limits 4.5 ~ 5.5 0 ~ 0.7 0 ~ 0.7 0 ~ 0.7 0.45 ~ 0.60 Unit V VP–P VP–P VP–P VP–P Pin descriptions P...