2

AN7555NZ

ICs for Audio Common Use

s Block Diagram

Pin No.

Description

1

Ch.4

+ output

2

GND (ch.4 output)

3

Ch.4

− output

4

5

Ch.3

+ output

6

GND (ch.3 output)

7

Ch.3

− output

8

GND (ch.3 output)

9

Ch.2 + output

10

AUX input

11

Ch.2

− output

12

Supply voltage Vcc

13

Ch.1

+ output

s Pin Descriptions

Pin No.

Description

14

GND (ch.1 output)

15

Ch.1

− output

16

Standby

17

Ch.1 input

18

Beep input

19

Ch.2 input

20

GND (input)

21

Ch.4 input

22

GND (printed circuit board)

23

Ch.3 input

24

Muting

25

Ripple filter

Ripple

filter

Beep

input

Protection

circuit

Attenuation

control

AUX

input

25

5

7

16

9

8

11

13

14

15

GND (output)

GND (output)

Attenuator

Attenuator

GND (output)

GND (output)

6

1

3

2

Note) It is not necessary to connect capacitor and resistor for stopping the oscillation at the output terminals.

Use them after check if necessary for noise countermeasure.