ML2731

2

January, 2000

PRELIMINARY DATASHEET

PRELIMINARY

TABLE OF CONTENTS

© 2000. Micro Linear is a registered trademark of Micro Linear Corporation. All other trademarks are the property of their

respective owners.

Products described herein may be covered by one or more of the following U.S. patents: 4,897,611; 4,964,026; 5,027,116;

5,281,862; 5,283,483; 5,418,502; 5,508,570; 5,510,727; 5,523,940; 5,546,017; 5,559,470; 5,565,761; 5,592,128; 5,594,376;

5,652,479; 5,661,427; 5,663,874; 5,672,959; 5,689,167; 5,714,897; 5,717,798; 5,742,151; 5,747,977; 5,754,012; 5,757,174;

5,767,653; 5,777,514; 5,793,168; 5,798,635; 5,804,950; 5,808,455; 5,811,999; 5,818,207; 5,818,669; 5,825,165; 5,825,223;

5,838,723; 5.844,378; 5,844,941. Japan: 2,598,946; 2,619,299; 2,704,176; 2,821,714. Other patents are pending.

Micro Linear makes no representations or warranties with respect to the accuracy, utility, or completeness

of the contents of this publication and reserves the right to make changes to specifications and product

descriptions at any time without notice. No license, express or implied, by estoppel or otherwise, to any

patents or other intellectual property rights is granted by this document. The circuits contained in this

document are offered as possible applications only. Particular uses or applications may invalidate some of

the specifications and/or product descriptions contained herein. The customer is urged to perform its own

engineering review before deciding on a particular application. Micro Linear assumes no liability

whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Micro Linear

products including liability or warranties relating to merchantability, fitness for a particular purpose, or

infringement of any intellectual property right. Micro Linear products are not designed for use in medical,

life saving, or life sustaining applications.

WARRANTY

General Description ................................................................................................................................................... 1

Simplified Block Diagram .......................................................................................................................................... 1

Features ...................................................................................................................................................................... 1

Applications ............................................................................................................................................................... 1

Block Diagram ........................................................................................................................................................... 3

Pin Configuration ....................................................................................................................................................... 4

Pin Descriptions ......................................................................................................................................................... 4

Functional Description ............................................................................................................................................... 6

Introduction .............................................................................................................................................................. 6

External Interfaces ................................................................................................................................................... 6

Mode Control ........................................................................................................................................................... 6

Description Of Operation ........................................................................................................................................... 6

Crystal Oscillator ..................................................................................................................................................... 7

Negative Voltage Generator ..................................................................................................................................... 7

Absolute Maximum Ratings ........................................................................................................................................ 11

Electrical Tables ......................................................................................................................................................... 11

Electrical Characteristics ............................................................................................................................................ 11

Operating Conditions ................................................................................................................................................. 11

Physical Dimensions .................................................................................................................................................. 12

Ordering Information .................................................................................................................................................. 12