SSM2000

REV. 0

–3–

PIN DESCRIPTION

Pin #

Name

Function and Explanation

1

L IN

Left Audio Input.

2

R IN

Right Audio Input.

3

L VCF C1

Left VCF Filter Cap Port.

4

L VCF C2

Left VCF Filter Cap Port.

5

V+

Positive Supply.

6

ACOM

Analog Common Voltage. In-

ternal Circuit Ground Point.

Must be held to a voltage ap-

proximately halfway between

V+ and V–. Should be a clean

low impedance voltage source

capable of at least 4 mA, such

as from a buffer driven off a

supply-splitting voltage divider.

7

VCA PORT

Input to VCA Control Port.

Allows external adjustment of

attenuation with a +22 mV/dB

slope. Zero volts relative to

ACOM gives zero additional

attenuation. Should be con-

nected to ACOM if function

not required.

8

VCF DET IN

Input to VCF Detector.

9

SUM OUT

Combined Left Plus Right

Output.

10

VCA DET IN

Input to VCA Detector.

11

VCF DET CAP

Voltage Controlled Filter.

Time Constant Capacitor Port.

12

VCA DET CAP

Voltage Controlled Amplifier.

Time Constant Capacitor Port.

WARNING!

ESD SENSITIVE DEVICE

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although the SSM2000 features proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +18 V

Audio Input Voltage . . . . . . . . . . . . . . . . . . Supply Voltage(s)

Control Port Voltage (Pin 7) . . . . . . . . . . . . . . Positive Supply

Default Override (Pin 14) . . . . . . . . . . . . . . . . . . . . . . . . . V+

Defeat (Pin 16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V+

Mute Override (Pin 17) . . . . . . . . . . . . . . . . . . . . . . . . . . . V+

Operating Temperature Range . . . . . . . . . . . . –40

°C to +85°C

Storage Temperature Range . . . . . . . . . . . . –65

°C to +150°C

°C

Lead Temperature (Soldering, 60 sec) . . . . . . . . . . . . . +300

°C

ESD RATINGS

883 (Human Body) Model . . . . . . . . . . . . . . . . . . . . . . 2.5 kV

EIAJ Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 V

ORDERING GUIDE

Temperature

Package

Package

Model

Range

Description

Option

SSM2000P

–40

°C to +85°C 24-Pin Plastic DIP N-24

SSM2000S

–40

°C to +85°C 24-Pin SOIC

SOL-24

PACKAGE INFORMATION

Package Type

JA

1

JC

Units

24-Pin Plastic DIP (P)

54

27

°C/W

24-Pin SOIC (S)

72

24

°C/W

NOTE

1

θ

for P-DIP packages;

θ

surface mount packages..

Pin #

Name

Function and Explanation

13

NC

Make No Connection to this

Pin.

14

DEFAULT

Default Threshold Adjust-

THRESHOLD

ment Port. Allows reduction

of noise reduction action if

signal source is relatively

clean such as CD sources.

Normally connected to Analog

Common. –1.2 V is recom-

mended for CDs; –2 V com-

pletely defeats noise reduction.

15

AUTO THRESHOLD

CAP

Automatic Threshold Detec-

tor Capacitor Port.

16

DEFEAT

Logic High: Defeats Noise

Reduction.

Logic Low: Normal Action.

Connect to Ground if not used.

17

MUTE

Logic High: Mute.

Logic Low: Normal Action.

Connect to Ground if not used.

18

NC

Make no connection to this

pin.

19

DIGITAL GND

Digital Logic Reference

(Logic Zero).

20

V–

Negative Supply.

21

R VCF C2

Right VCF Capacitor Port.

22

R VCF C1

Right VCF Capacitor Port.

23

R OUT

Right Audio Output.

24

L OUT

Left Audio Output.