ISD1900

Publication Release Date: Jan 5, 2009

Revision 0.51

2

TABLE OF CONTENTS

1. GENERAL DESCRIPTION ...............................................................................................................................3

2. FEATURES.......................................................................................................................................................3

2.1.

Address Mode........................................................................................................................................... 3

2.2.

Direct Mode............................................................................................................................................... 4

3. BLOCK DIAGRAM............................................................................................................................................5

4. PIN CONFIGURATION.....................................................................................................................................6

5. PIN DESCRIPTION ..........................................................................................................................................8

6. FUNCTIONAL DESCRIPTION .......................................................................................................................11

6.1.

Address Mode......................................................................................................................................... 11

6.1.1

Record (REC

6.1.2

Edge-triggered Playback (PlayE

6.1.3

Level-triggered Playback ( PlayL

6.1.4

Playback (Supersedes Record) Operation...................................................................................... 15

6.1.5

XCLK Feature.................................................................................................................................. 16

6.2.

Direct Mode............................................................................................................................................. 16

6.3.

Other Operations .................................................................................................................................... 19

6.3.1

Rosc Operation................................................................................................................................19

6.3.2

LED Operation................................................................................................................................. 20

6.3.3

Feed-Through mode Operation....................................................................................................... 20

6.3.4

Power-On Playback Operation........................................................................................................ 20

6.3.5

Automatic Single Message Playback .............................................................................................. 20

6.3.6

Power is interrupted Abruptly .......................................................................................................... 20

7. ABSOLUTE MAXIMUM RATINGS

[1]..............................................................................................................21

7.1.

Operating Conditions .............................................................................................................................. 21

8. ELECTRICAL CHARACTERISTICS ..............................................................................................................22

8.1.

DC Parameters ....................................................................................................................................... 22

8.2.

AC Parameters ....................................................................................................................................... 23

9. TYPICAL APPLICATION CIRCUIT ................................................................................................................24

10. PACKAGING...................................................................................................................................................26

10.1.

28-Lead 300-Mil Plastic Small Outline Integrated Circuit (SOIC) ....................................................... 26

11. ORDERING INFORMATION ..........................................................................................................................27

12. VERSION HISTORY.......................................................................................................................................28