1–17

Product Data Sheets

ISD1000A Series

1

SSD

SSA

A0

A1

A2

A3

A4

A5

A6

A7

CE

PD

P/R

EOM

XCLK

V

V

V

V

SP+

SP–

AUX IN

ANA IN

ANA OUT

MIC REF

MIC

AGC

CCD

CCA

C3

16

Ω

SPEAKER

1

2

3

4

5

6

9

10

23

24

27

25

26

28

16

12

13

14

15

11

20

21

18

17

19

ELECTRET

MICROPHONE

0.1

µF

CC

V

CC

V

22

µF

SS

V

PLAYBACK/RECORD

POWER DOWN

CHIP ENABLE

ISD1016A/1020A

0.1

µF

0.1

µF

C5

0.1

µF

Mic Ref

C1

0.1

µF

CC

V

C2

4.7

µF

470 K

Ω

R2

1 K

Ω

R1

10 K

Ω

R3

C4

220

µF

(Note)

5.1 K

Ω

10 K

Ω

R4

C7

C6

C8

APPLICATION EXAMPLE – DESIGN SCHEMATIC

APPLICATION EXAMPLE – BASIC DEVICE CONTROL

Control Step

Function

Action

1

Power up chip and select record/playback mode

1. PD = LOW

2. P/R = As desired

2

Set message address for record/playback

Set addresses A0–A7

3

Begin playback/record

CE = Pulsed LOW (Playback)

CE = Held LOW (Record)

4

End cycle

CE = HIGH and EOM reached

NOTE:

If desired, pin 18 may be left unconnected

(microphone preamplifier noise will be higher). In this

case, pin 18 must not be tied to any other signal or

voltage.

Additional design example schematics are provided in

the Application Notes and Design Manual in this book.

06.DataBook_1000A Dsht Page 17 Friday, September 27, 1996 10:44 AM