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BH7240

Rohm
Part Number BH7240
Manufacturer Rohm
Description Color TV signal encoder
Published Mar 23, 2005
Detailed Description Multimedia ICs Color TV signal encoder BH7240AKV The BH7240AKV is an IC that converts digital RGB signals (8-bit) to NT...
Datasheet PDF File BH7240 PDF File

BH7240
BH7240


Overview
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 75Ω driver.
Applications • TV peripheral devices 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 75Ω driver.
•Block diagram GDATA0 GDATA1 GDATA2 GDATA3 GDATA4 GDATA5 GDATA6 36 35 34 33 32 31 30 29 28 27 26 25 GDATA7 BDATA4 BDATA5 BDATA6 BDATA7 8 BDATA3 37 DECODER 8 BDATA2 38 CLK BDATA1 39 LATCH CLK LATCH CLK LATCH 22 RDATA2 DECODER DECODER 8 23 RDATA1 24 RDATA0 BDATA0 40 VREF CELL MATRIX CELL MATRIX CELL MATRIX VCC 21 RDATA3 VCLK 41 CLK CLAMP CLAMP CLAMP 20 DVDD DGND 42 GND 19 RDATA4 VREFOUT 43 MATRIX Burst Flag GEN.
B-Y 18 SYNC 17 RDATA5 N.
C.
44 R G B SYNC R-Y RDATA6 AGND1 45 GND Y SYNC ADD.
CHROMA GEN.
16 LPF YTRAP 15 Y/C MIX SCIN RDATA7 RCLAMP 46 VCC1 47 VCC 6dB 6dB 6dB 6dB BPF SYNC 14 SYNCIN GCLAMP 48 GND 75 75 75 75 75 75 13 VCC NT / PAL 1 BCLAMP 2 GND2 3 ROUT 4 GOUT 5 BOUT 6 YOUT 7 COUT 8 VOUT 9 VCC2 10 YTRAP 11 N.
C.
12 N.
C.
1 Multimedia ICs BH7240AKV •Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol DVDD, AVCC1 AVCC2 Pd Topr Tstg Limits 7∗1 900∗2 – 20 ~ + 70 – 55 ~ + 125 Unit V mW °C °C ∗1 At Ta = 25°C ∗2 Reduced by 9.
0mW 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 Symbol DVDD, AVCC1 AVCC2 Limits 4.
50 ~ 5.
50 Unit V •Recommended input conditions (at DV Parameter VCLK, RGBDATA input high level VCLK, RGBDAT...


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