SM6801A

SEIKO NPC CORPORATION —2

BLOCK DIAGRAM

PIN DESCRIPTION

Number

*2. Ip = input pin with built-in pull-up resistor

Function

1

DRCN

I

Dynamic range compression mode setting (HIGH: normal operation, LOW: DRC mode)

2

VDD1

–

Supply (input system)

3

VREF1

–

Reference voltage 1 (bias voltage)

4

IN

I

Signal input

5

EQP

I

Equalizer network connection

6

EQN

I

Equalizer network connection

7

VSS1

–

Ground (input system)

8

TESTN

Ip

Test pin (HIGH: normal operation, LOW: test mode)

9

VDD3

I

Supply (OUTN stage)

10

OUTN

O

Speaker minus (–) output

11

VSS2

–

Ground (output stage)

12

OUTP

O

Speaker plus (

+) output

13

VDD4

–

Supply (OUTP stage)

14

PDWN

I

Power-down control (active LOW)

15

VDD2

–

Supply (logic system)

16

MUTEN

I

Mute control (active LOW)

IN

VSS2

VSS1

OUTN

VDD3

VDD1

PWM

Modulator

OSC

EQP

EQN

+

−

MUTE,

POWER DOWN,

PROTECTION

LEVEL

SHIFTER

OUTP

BUFFER

BUFFER

LEVEL

SHIFTER

+

−

BIAS

VREF

VREF1

VDD2

DRCN

PDWN

MUTEN

TESTN

VDD4