BH7236AF データシートの表示（PDF） - ROHM Semiconductor

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BH7236AF

Color TV Signal Encoder

ROHM Semiconductor 

Multimedia ICs

•Application example (NTSC color TV signal)

BH7236AF

1

Analog R input

0.1µ

Analog G input

2 CLAMP

SYNC

3 CLAMP

0.1µ

Analog B input

SYNC

4 CLAMP

0.1µ

SYNC

N.C. 5

Color subcarrier input

6

VCC

7

MATRIX

BGPOUT 8

N.C. 9

BFP

BFP GEN.

Composite SYNC input

10

SYNCOUT 11

VCC

12

SYNC

24

75Ω

23 ROUT

75Ω

22 GOUT

75Ω

21 BOUT

+ 75 Color TV signal

75Ω

20

220µ

VCC

19

18 N.C.

17

75Ω

16 YOUT

75Ω

15 COUT

14 N.C.

13 N.C.

•Operation notes

(1) Input impedance at the input terminals should be as

low as possible as the analog RGB signal is clamped

there.

(2) The color subcarrier should have a duty of 50%.

Duty fluctuation will affect chroma phase.

•External dimensions (Units: mm)

15.0 ± 0.2

24

13

(3) Composite synch and burst flag pulse inputs should

conform to their respective standards, as input of an

off-standard signal will shift the burst position and

cause other problems that may prevent the TV from

displaying color images. For input, use the TTL level

and an impedance of 8kΩ.

1

12

1.27

0.4 ± 0.1

0.3Min.

0.15

SOP24

6

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