WMS7140/1

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4. TABLE OF CONTENTS

1. GENERAL DESCRIPTION.................................................................................................................. 2

2. FEATURES ......................................................................................................................................... 2

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

4. TABLE OF CONTENTS ...................................................................................................................... 4

5. PIN CONFIGURATION ....................................................................................................................... 5

6. PIN DESCRIPTION............................................................................................................................. 6

7. FUNCTIONAL DESCRIPTION............................................................................................................ 7

7.1. Potentiometer and Rheostat Modes ............................................................................................. 7

7.1.1. Rheostat Configuration .......................................................................................................... 7

7.1.2. Potentiometer Configuration .................................................................................................. 7

7.2. Non-Volatile Memory (NVMEM) ................................................................................................... 7

7.3. Serial Data Interface ..................................................................................................................... 8

7.4. Operation Overview ...................................................................................................................... 8

8. TIMING DIAGRAMS............................................................................................................................ 9

9. ABSOLUTE MAXIMUM RATINGS.................................................................................................... 11

10. ELECTRICAL CHARACTERISTICS ............................................................................................... 12

10.1 Test Circuits............................................................................................................................... 14

11. TYPICAL APPLICATION CIRCUITS .............................................................................................. 15

11.1. Layout Considerations.............................................................................................................. 17

12. PACKAGE DRAWINGS AND DIMENSIONS.................................................................................. 18

13. ORDERING INFORMATION........................................................................................................... 21

14. VERSION HISTORY ....................................................................................................................... 22