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ROHM Semiconductor - Color TV signal encoder

Numéro de référence BH7240AKV
Description Color TV signal encoder
Fabricant ROHM Semiconductor 
Logo ROHM Semiconductor 





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BH7240AKV fiche technique
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 75driver.
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 75driver.
Block diagram
36 35 34 33 32 31 30 29 28 27 26 25
BDATA3 37
BDATA2 38
BDATA1 39
DECODER
8
8
DECODER
DECODER
8
CLK LATCH CLK LATCH CLK LATCH
24 RDATA0
23 RDATA1
22 RDATA2
BDATA0 40
VCLK 41
VREF
CLK
DGND 42
GND
CELL
MATRIX
CLAMP
CELL
MATRIX
CLAMP
CELL
MATRIX
CLAMP
21 RDATA3
VCC
20 DVDD
19 RDATA4
VREFOUT 43
N.C. 44
AGND1 45
RCLAMP 46
VCC1 47
GCLAMP 48
GND
VCC
R
G
B
MATRIX
R-Y B-Y
CHROMA
GEN.
Y
Burst
Flag
GEN.
SYNC
SYNC SYNC
ADD.
LPF YTRAP
6dB 6dB 6dB 6dB
BPF
Y/C
MIX
SYNC
GND
75 75 75
75 75
75
VCC
1 2 3 4 5 6 7 8 9 10 11 12
18 RDATA5
17 RDATA6
16 RDATA7
15 SCIN
14 SYNCIN
13 NT / PAL
1

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