CXA2040 데이터 시트보기 (PDF) - Sony Semiconductor

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CXA2040

I2C Bus-Compatible Video Switch

Sony Semiconductor 

CXA2040Q

Pin Description

Pin

No.

Symbol Pin voltage

Equivalent circuit

Description

1 Y1

5 Y2

3 C1

7 C2

4.5V

1

20k

5

147

3

7

×2

28k

VCC

Y/C separation signal inputs.

Biased to approximately 4.5V.

Input the input signals through

capacitors. Connect protective

resistor of 220Ω between these

pins and the capacitors.

Y1 and Y2 pins: Luminance

signals input.

C1 and C2 pins: Chrominance

signals input.

4 S1

6 S2

50k 50k

4

6

100k

×4

VCC Applying a DC voltage to S1 and

S2 pins allows these voltages to

be applied to the microcomputer

as the I2C bus status register data.

S1, S2 = 0 to 2V

OPEN = 0, SEL = 1

S1, S2 = 4.75 to 7.25V

OPEN = 0, SEL = 0

S1, S2 = 9.5 to 12V

OPEN = 1, SEL = 0

11 YOUT

9 COUT

4.5V

200

×5

11

9

×6

VCC

1.2k

×2

×2

Y/C signal outputs.

YOUT pin: Luminance signal

output.

COUT pin: Chrominance signal

output.

17 CVOUT1

15 CVOUT2

13 CVOUT3

4.5V

200

17 × 5

15

13 × 6

VCC

1.2k

×2

×2

Composite video signal outputs.

CVOUT1, CVOUT2:

0dB output with respect to

the input signal.

CVOUT2:

+6dB output with respect

to the input signal.

–3–

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