BA7232 データシートの表示（PDF） - ROHM Semiconductor

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BA7232

Color TV signal encoder

ROHM Semiconductor 

Multimedia ICs

•Application example (NTSC color TV signals)

BA7232FS

Analog B signal

Analog G signal

Analog R signal

0.1µ

1

0.1µ

2

0.1µ

3

VCC

4

CLAMP

BFP

CLAMP

BFP

CLAMP

BFP

Composite synch

5

75Ω

20

75Ω

19

75Ω

18

MATRIX

VCC

17

SYNC

16

VCC

Composite synch output

Burst flag pulse

(BFP)

Color subcarrier

4.7k

6

VCC

7

0.1µ

8

560

FILTER

9

GND

75Ω

15

14

+

75

75Ω

13

220µ

12

Color TV

signal output

10

75Ω

GND

11

•Operation notes

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

•External dimensions (Units: mm)

low as possible as the analog RGB signal is clamped

there.

8.7 ± 0.2

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

20

11

Duty fluctuation will affect chroma phase. Resistance-

splitting input is used in the "Application example" to

accommodate 5VP-P CMOS input. For other types of

1

10

input, adjust to 0.5VP-P at SCIN.

(3) Composite synch and burst flag pulse inputs should

conform to their respective standards, as improper tim-

0.8

0.36 ± 0.1

0.3Min.

0.15

ing between them can prevent the TV from displaying

color images. For input, use the TTL level and an

SSOP - A20

impedance of 8kΩ.

6

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