U7313

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 14

www.unisonic.com.tw

QW-R502-173.B

PIN DESCRIPTIONS

PIN NO.

PIN NAME

I/O

PIN DESCRIPTION

1

Internal reference voltage, typical value is vdd/2, connect a capacitor to gnd to

depress ripple voltage.

2

Supply voltage.

3

GND

Analog gnd.

4

L

I

Connect a capacitor to gnd, the center frequency and quality of the response

behavior of treble module can be chosen by the capacitor. (Left speaker)

5

R

I

Connect a capacitor to gnd, the center frequency and quality of the response

behavior of treble module can be chosen by the capacitor. (Right speaker)

6

INR

I

Input of volume module.(Right speaker)

7

OUTR

O

Output of gain module.(Right speaker)

8

LOUDR

I

Connect

a

capacitor

to

gnd,

change

the

capacitor

can

adjust

the

amplitude-frequency characteristic of loudness.(Right speaker)

9

R3

I

Channel 3 input.(Right speaker)

10

R2

I

Channel 2 input.(Right speaker)

11

R1

I

Channel 1 input.(Right speaker)

12

LOUDL

I

Connect

a

capacitor

to

gnd,

change

the

capacitor

can

adjust

the

frequency-amplitude characteristic of loudness.(Left speaker)

13

L3

I

Channel 3 input.(Left speaker)

14

L2

I

Channel 2 input.(Left speaker)

15

L1

I

Channel 1 input.(Left speaker)

16

INL

I

Input of volume module.(Left speaker)

17

OUTL

O

Output of gain module.(Left speaker)

18

BINL

I

See the application circuit, change the capacitor and the resistor can adjust the

center frequency and quality of the response behavior of bass module.(Left

speaker)

19

BOUTL

I

See the application circuit, change the capacitor and the resistor can adjust the

center frequency and quality of the response behavior of bass module. (Left

speaker)

20

BINR

I

See the application circuit, change the capacitor and the resistor can adjust the

center frequency and quality of the response behavior of bass module. (Right

speaker)

21

BOUTR

I

See the application circuit, change the capacitor and the resistor can adjust the

center frequency and quality of the response behavior of bass module. (Right

speaker)

22

OUTRR

O

Output of the right rear speaker.

23

OUTLR

O

Output of left rear speaker.

24

OUTRF

O

Output of right front speaker.

25

OUTLF

O

Output of left front speaker.

26

DIG GND

Digital gnd of serial I

27

SDA

I/O

Data signal of serial I

28

SCL

I

Clock signal of serial I