CXA2079Q 查看數據表（PDF） - Sony Semiconductor

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CXA2079Q

S2-Compatible 6-Input 2-Output Audio/Video Switch

Sony Semiconductor 

Pin

No.

Symbol

Pin

voltage

33 SCL

—

34 SDA

—

36 DC OUT

—

55 TRAP1

3.8V

Equivalent circuit

VCC

4k

33

10k

VCC

4k

34

VCC

36

4k

1k Q1

28k

VCC

100

55

1k

CXA2079Q

Description

I2C bus signal input

VILmax = 1.5V

VIHmin = 3.0V

I2C bus signal input

VILmax = 1.5V

VIHmin = 3.0V

VOLmax = 0.4V

Outputs the S2-compatible DC

superimposed onto the COUT2

output. The DC is superimposed by

connecting this pin to the COUT2

output via a capacitor.

Control is performed by the I2C bus.

When 0V is output, Q1 is ON and

the impedance is 5kΩ.

S2 protocol output DC impedance of

10 ± 3kΩ is realized by attaching

external resistance of 4.7kΩ.

DC OUT (bus) Output DC

0

4.5V

1

0V

2

1.9V

3

4.5V

Connects trap circuit for subcarrier.

48 MUTE

—

50 BIAS

4.5V

VCC

147 72k

48

28k

VCC VCC

VCC

20k 147

50

20k

–6–

Audio signal output mute.

Mute OFF at 1.5V or less

Mute ON at 2.5V or more

Mute OFF when open

Internal reference bias (Vcc/2).

Connects to GND via a capacitor.

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