ML2721

2

January, 2000

PRELIMINARY DATASHEET

PRELIMINARY

TABLE OF CONTENTS

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.

© Micro Linear 2000. 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.

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

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

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

Simplified Block Diagrams ......................................................................................................................................... 3

Block Diagram ........................................................................................................................................................... 4

Pin Configuration ....................................................................................................................................................... 5

Pin Descriptions ......................................................................................................................................................... 5

Functional Description ............................................................................................................................................... 8

Introduction .............................................................................................................................................................. 8

Circuit Block Descriptions ........................................................................................................................................ 8

Modes Of Operation .................................................................................................................................................. 10

Overview ................................................................................................................................................................. 10

Receive Modes ........................................................................................................................................................ 10

Transmit Mode ......................................................................................................................................................... 12

Standby Mode .......................................................................................................................................................... 15

Test Mode ................................................................................................................................................................ 15

Control Interfaces ....................................................................................................................................................... 16

Register Information ................................................................................................................................................. 17

Transmit and Receive Data Interfaces ...................................................................................................................... 22

Applications ............................................................................................................................................................... 23

Electrical Characteristics ............................................................................................................................................ 24

Electrical Tables ......................................................................................................................................................... 24

Absolute Maximum Ratings ........................................................................................................................................ 24

Operating Conditions ................................................................................................................................................. 24

Physical Dimensions .................................................................................................................................................. 28

Ordering Information .................................................................................................................................................. 28

WARRANTY