EUA6412

DS6412 Ver 1.0 Dec. 2006

3

Pin Configurations

Package Type

Pin Configurations(Top View)

TSSOP-24 with a Thermal

Pad exposure on the bottom

of the package

Pin Description

PIN

PIN

I/O

DESCRIPTION

BYPASS

11

Tap to voltage divider for internal mid-supply bias generator

GAIN0

2

I

Bit 0 of gain control

GAIN1

3

I

Bit 1 of gain control

GND

1,12

13,24

Ground connection for circuitry. Connected to thermal pad.

LHPIN

6

I

Left channel headphone input, selected when

BTL

SE/

is held high.

LIN

10

I

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

inputs.

LLINEIN

5

I

Left channel line input, selected when

BTL

SE/

is held low.

LOUT+

4

O

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

LOUT-

9

O

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

PC-BEEP

14

I

The input for PC Beep mode. PC-BEEP is enabled when a > 1-V (peak-to-peak)

square wave is input to PC-BEEP or PCB ENABLE is high.

LINE

HP/

17

I

LINE

HP/

is the input MUX control input. When the

LINE

HP/

terminal is held

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

LINE

HP/

terminal is held low, the line BTL inputs (LLINEIN or RLINEIN [5,

23]) are active.

7,18

I

Power supply for output stage.

RHPIN

20

I

Right channel headphone input, selected when

BTL

SE/

is held high

RIN

8

I

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

inputs.

RLINEIN

23

I

Right channel line input, selected when

BTL

SE/

is held low.

ROUT+

21

O

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

ROUT-

16

O

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

SHUTDOWN

22

I

When held low, this terminal place the entire device, except PC-BEEP detect

circuitry, in shutdown mode.

BTL

SE/

15

I

Input and output MUX control. When this terminal is held high, the LHPIN or

RHPIN and SE output is selected. When this terminal is held low, the LLINEIN

or RLINEIN and BTL output are selected.

19

I

achieve highest performance.