QS7779PM/CM

NIPPON PRECISION CIRCUITS—3

PIN DESCRIPTION

Number

Name

I/O

Description

P arallel

Serial

1

Q X A C 3

I

Capacitor 3 fo r QEXPANDER fi lter A

2

Q X A C 2

I

Capacitor 2 fo r QEXPANDER fi lter A

3

Q X A C 1

I

Capacitor 1 fo r QEXPANDER fi lter A

4

R I N

I

Right channel signal input

5

LIN

I

Left channel signal input

6

COUT

O

Decoded center signal output

7

C I N

I

Center signal input for summing with the right and the left signal outputs

8

VREFIN

O

9

VREFOUT

O

1 0

VREF

I

Signal reference input

1 1

G N D

–

Ground 0V

12

SPRD

–

I

Enhancement control (H: spread maximum, L: spread minimu m )

–

1. QS7779CM :CMOS input. No protective diode between the terminal and V D D.

QS7779PM :CMOS input. Protective diode is in between the terminal and V D D.

I

Ser ial data shift clock

13

B Y P

–

I

Bypass control (H: Bypass on, L: Qsurround on)

–

2. QS7779CM :Nch open drain terminal. No protective diode between terminal and V D D.

QS7779PM :CMOS input. Protective diode is in between the terminal and V D D.

I/O

1 4

P / S

I

Interface mode control (H: parallel I/O, L: serial I/O)

1 5

V D D

–

Digital pow er supply DC4.5 to 5.5V

16

MUTE

–

I

Output mute control (H: mute on, L: mute off)

–

STRB

I

1 7

LOUT

O

Left signal output

1 8

R O U T

O

Right signal output

1 9

QXBC4

I

Capacitor 4 fo r QEXPANDER fi lter B

2 0

QXBC3

I

Capacitor 3 fo r QEXPANDER fi lter B

2 1

QXBC2

I

Capacitor 2 fo r QEXPANDER fi lter B

2 2

QXBC1

I

Capacitor 1 fo r QEXPANDER fi lter B

2 3

V C C

–

Analog pow er supply DC5 to 13V

2 4

Q X A C 4

I

Capacitor 4 fo r QEXPANDER fi lter A