SSM2163

REV. 0

–6–

PIN DESCRIPTION

Pin #

Mnemonic

Function

1

DGND

Digital Ground.

Digital Negative Supply.

3

DATA OUT

Serial data output clocked on positive clock edge. Connect DATA OUT to DATA IN pin to

Digital Positive Supply.

Audio Signal Input 1.

6

NC (Shield)

Shield Pin. Should be tied to AGND to minimize crosstalk.

Audio Signal Input 3.

8

NC (Shield)

Shield Pin. Should be tied to AGND to minimize crosstalk.

Audio Signal Input 5.

10

Analog Positive Supply.

11

Audio Signal Input 7.

12

Analog Negative Supply.

13

ACOM

as a pseudo ground in single supply applications.

14

Left Audio Output.

15

Right Audio Output.

16

Audio Signal Input 8.

17

AGND

Analog Ground.

18

Audio Signal Input 6.

19

NC (Shield)

Shield Pin. Should be tied to AGND to minimize crosstalk.

20

Audio Signal Input 4.

21

NC (Shield)

Shield Pin. Should be tied to AGND to minimize crosstalk.

22

Audio Signal Input 2.

23

NC (Shield)

Shield Pin. Should be tied to AGND to minimize crosstalk.

24

LD

Load Data.

25

WRITE

Write Data.

26

CLK

Clock.

27

Data In

Serial Data Input. Clocked on positive clock edge.

28

SYSTEM MUTE

Mutes all eight input channels thus left and right audio output are muted. System mute does not

change the state of internal latches. All digital data remains intact after system mute is applied.

Logic One: Mutes Output

Logic Zero: Normal Operation

DATA

ATTENUATION

0

0

0

1

1

1

0

0

0

0

0

0

0

0

0

0

0

1

0

1

0

1

1

1

1

1

1

1

1

1

0

1

1

1

0

1

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

0dB

–1dB

–2dB

–61dB

–62dB

–63dB

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

0

0

1

1

0

0

1

1

0

1

0

1

0

1

0

1

INPUT CHANNEL 1

INPUT CHANNEL 2

INPUT CHANNEL 3

INPUT CHANNEL 4

INPUT CHANNEL 5

INPUT CHANNEL 6

INPUT CHANNEL 7

INPUT CHANNEL 8

DATA MODE

ADDRESS MODE

DATA

ADDRESS

SELECTION

X = “DON’T CARE," SHADED AREA IS DATA

MSB

LSB

MSB

LSB

X

X

X

X

X

X

X

X

R

I

G

H

T

L

E

F

T

OUTPUT SELECT

1 = SELECTED, 0 = NOT SELECTED

INPUT SELECT

0

0

0

0

1

1

1

1

Figure 3. Address and Data Decoding Truth Table