PA3427

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 7

www.unisonic.com.tw

QW-R502-357.b

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PIN CONFIGURATION

1

2

3

4

5

6

7

8

9

10

GND/HS

GAIN0

GAIN1

LLINEIN

LPHIN

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, directly connected to thermal pad.

2

GAIN0

I

Bit 0 of gain control

3

GAIN1

I

Bit 1 of gain control

4

O

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

5

LLINEIN

I

Line input for left channel, selected when HP/ LINE pin is held low.

6

LHPIN

I

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

7,18

I

Supply voltage

8

I

Differential input for Right channel. AC ground for single-ended inputs.

9

O

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

10

I

Differential input for Left channel. AC ground for single-ended inputs.

11

BYPASS

Tap to voltage divider for internal mid-supply bias generator

14

PC-BEEP

I

The input for PC-BEEP mode. PC-BEEP is enabled when at least eight

15

SE/ BTL

I

Hold low for BTL mode, hold high for SE mode.

16

O

negative output for Right channel

17

HP/ LINE

I

MUX control input, hold high to select headphone inputs (6, 20), hold low

to select line inputs (5, 23).

19

20

RHPIN

I

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

21

O

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

22

SHUTDOWN

I

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

23

RLINEIN

I

Line input for Right channel, selected when HP/ LINE pin is held low.