PA3428

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 9

www.unisonic.com.tw

QW-R502-242.A

PIN CONFIGURATION

1

2

3

4

5

6

7

8

9

10

GND/HS

GAIN0

GAIN1

LLINEIN

LHPIN

24 GND/HS

RLINEIN

RHPIN

HP/LINE

SE/BTL

23

22

21

20

19

18

17

16

15

11

BYPASS

12

GND/HS

14 PC-BEEP

13 GND/HS

SHUTDOWN

PA3427

PIN DESCRIPTION

PIN NO

PIN NAME

I/O

DESCRIPTION

1,12,13,24

GND/HS

Ground, connected to thermal pad directly.

11

BYPASS

Connected to voltage divider

2

GAIN0

I

For gain control: Bit 0

3

GAIN1

I

For gain control: Bit 1

5

LLINEIN

I

Line input for Left channel, available when pin17 is held low.

6

LPHIN

I

Headphone input Left channel, available when pin17 is held high.

7,18

I

Supply voltage

8

I

Differential input for Right channel. And for single-ended inputs is also AC

ground.

10

I

Differential input for Left channel. And for single-ended inputs is also AC

ground.

14

PC-BEEP

I

waves is input to this pin, PC-BEEP is enabled.

15

SE/BTL

I

Low for BTL mode, high for SE mode.

17

HP/ LINE

I

Input of MUX control. Being high to select the inputs of Pin6, 20, and low to

select inputs of PIN 5, 23.

19

20

RHPIN

I

Right channel headphone input, selected when HP/LINE pin is held high.

22

SHUTDOWN

I

in shutdown mode when held low, expect PC-BEEP remains active.

23

RLINEIN

I

Headphone input right channel, available when pin17 is held low.

4

O

Positive output for Left channel in BTL mode, positive output in SE mode.

9

O

Negative output for Left channel, and high impedance in SE mode.

16

O

Negative output for Right channel, and high impedance in SE mode.

21

O

Positive output for right channel in BTL mode, positive output in SE mode.