PA3312

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

3 of 11

www.unisonic.com.tw

QW-R107-055.B

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PIN CONFIGURATION

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PIN DESCRIPTION

PIN NO

PIN NAME

I/O

DESCRIPTION

1, 12, 13, 24

GND

Ground connection for circuitry. Connected to the thermal pad.

11

BYPASS

Tap to voltage divider for internal mid-supply bias generator

2

GAIN0

I

Bit 0 of gain control

3

GANIN1

I

Bit 1 of gain control

5

LLINEIN

I

Left-channel line input, selected when SE/BTL is held low

6

LHPIN

I

Left-channel headphone input, selected when SE/BTL is held high

7, 18

I

Power supply for output stage

8

RIN

I

Common right input for fully differential input. AC ground for single-ended

inputs.

10

LIN

I

Common left input for fully differential input. AC ground for single-ended

inputs.

14

PC-BEEP

I

For PC Beep mode. PC-BEEP is enabled when a > 1.5-V (peak-to-peak)

square wave is input

17

HP/LINE

I

HP/LINE is the input MUX control input. When the HP/LINE terminal is

held high, the headphone inputs (LHPIN or RHPIN [6, 20]) are active.

When the HP/LINE terminal is held low, the line inputs (LLINEIN or

RLINEIN [5, 23]) are active.

15

SE/BTL

I

Hold SE/BTL low for BTL mode and hold high for SE mode.

19

I

achieve highest performance.

20

RHPIN

I

Right-channel headphone input, selected when SE/BTL is held high

23

RLINEIN

I

Right-channel line input, selected when SE/BTL is held low

22

SHUTDOWN

I

Places entire IC in shutdown mode when held low, except PC-BEEP

remains active

4

O

Left-channel positive output in BTL mode and positive output in SE mode

9

O

Left-channel negative output in BTL mode and high-impedance in SE

mode

21

O

Right-channel positive output in BTL mode and positive output in SE

mode

16

O

Right-channel negative output in BTL mode and high-impedance in SE

mode