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1 Multimedia ICs Color TV signal encoder BH7240AKV The BH7240AKV is an IC that converts digital RGB signals (8-bit) 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 75Ωdriver. • Applications TV peripheral devices • Block diagram 363534333231302928272625 1234 56789101112 24 23 22 21 20 19 18 17 16 15 14 13 RDATA0 RDATA1 RDATA2 RDATA3 DV DD RDATA4 RDATA5 RDATA6 RDATA7 SCIN SYNCIN NT / PAL 37 38 39 40 41 42 43 44 45 46 47 48 BDATA3 BDATA2 BDATA1 BDATA0 VCLK DGND VREFOUT N.C. AGND1 RCLAMP V CC1 GCLAMP BCLAMP GND2 R OUT G OUT B OUT Y OUT C OUT V OUT V CC 2 YTRAP N.C.N.C. BDATA4BDATA5BDATA6BDATA7GDATA0GDATA1GDATA2GDATA3GDATA4GDATA5GDATA6GDATA7 DECODER LATCH CLAMPCLAMP MATRIX LPF BPF6dB6dB6dB6dB 75 GNDV CC VCC GND GND CLK 7575757575 YTRAP Y / C MIX Burst Flag GEN. CLAMP VREF CELL MATRIX CELL MATRIX CELL MATRIX DECODERDECODER CLK LATCH CLK LATCH CLK SYNC CHROMA GEN. SYNC ADD. V CC SYNC 8 8 8 R-YB-Y Y R G B SYNC • Features 1) Supports both NTSC and PAL. 2) Internal RGB3-channel DAC (internal regulator). 3) Internal burst timing generator circuit. 4) Y / C separation output pin. 5) Analog RGB signal output pin. 3) Internal 75Ωdriver.