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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 75

Ω driver.

TV peripheral devices

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1234

56

789

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24

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RDATA0

RDATA1

RDATA2

RDATA3

RDATA4

RDATA5

RDATA6

RDATA7

SCIN

SYNCIN

NT / PAL

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BDATA3

BDATA2

BDATA1

BDATA0

VCLK

DGND

VREFOUT

N.C.

AGND1

RCLAMP

GCLAMP

DECODER

LATCH

CLAMP

CLAMP

MATRIX

LPF

BPF

6dB

6dB

6dB

6dB

75

GND

GND

GND

CLK

75

75

75

75

75

YTRAP

Y / C

MIX

Burst

Flag

GEN.

CLAMP

VREF

CELL

MATRIX

CELL

MATRIX

CELL

MATRIX

DECODER

DECODER

CLK

LATCH

CLK

LATCH

CLK

SYNC

CHROMA

GEN.

SYNC

ADD.

SYNC

8

8

8

R-Y

B-Y

Y

R

G

B

SYNC

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 75

Ω driver.