CXA2074Q/S データシートの表示（PDF） - Sony Semiconductor

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CXA2074Q/S

US Audio Multiplexing Decoder

Sony Semiconductor 

CXA2074Q/S

Pin No.

QFP SDIP

Symbol

Pin

voltage

31 32 VCAIN 4.0V

Equivalent circuit

VCC

47k

47k

20k

VCC

32

(31)

Description

VCA input pin.

Input the variable

de-emphasis output signal

from Pin 31 (30) via a

coupling capacitor.

32 33 VCATC 1.7V

×4

×4

VCC

33

(32)

↓

4k

↓

20k

50µ

7.5µ

Determine the restoration

time constant of the VCA

control effective value

detection circuit.

(The specified restoration

time constant can be

obtained by connecting a

10µF capacitor between this

pin and GND.)

33 34 VCAWGT 4.0V

VCC

40k 40k 3p

2.9V

36k

↓

4k ↓ 30k

50µ

8µ

580

34

580 147

(33)

8k

Weight the VCA control

effective value detection

circuit.

(Connect a 1µF capacitor

and a 3.9kΩ resistor in series

between this pin and GND.)

35 35 AUX1-R 4.0V

36 36 AUX1-L 4.0V

37 37 AUX2-R 4.0V

38 38 AUX2-L 4.0V

10k

147

27.5k

47k

4V

VCC

35

36

37

38

Right channel external input

1 pin.

Left channel external input

1 pin.

Right channel external input

2 pin.

Left channel external input

2 pin.

– 11 –

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