ADM8690ARNZ 查看數據表（PDF） - Analog Devices

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ADM8690ARNZ

Microprocessor Supervisory Circuits

Analog Devices 

ADM8690/ADM8691/ADM8695

TABLE OF CONTENTS

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

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

Product Highlights ........................................................................... 1

Functional Block Diagrams............................................................. 1

Revision History ............................................................................... 2

General Description ......................................................................... 3

Specifications..................................................................................... 4

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Pin Configurations and Function Descriptions ........................... 7

Typical Performance Characteristics ............................................. 9

Circuit Information ........................................................................ 11

Battery Switchover Section........................................................ 11

Power-Fail RESET Output......................................................... 11

Watchdog Timer RESET............................................................ 12

Watchdog Output (WDO) (ADM8691/ADM8695) ................. 13

CE Gating and RAM Write Protection

(ADM8691/ADM8695) ............................................................. 13

REVISION HISTORY

12/11—Rev. B to Rev. C

Deleted ADM8692 and ADM8693 ............................. Throughout

Changes to Table 4............................................................................ 7

Change to Power-Fail RESET Output Section............................ 11

Changes to ADM8691/ADM8695 Applications Section .......... 17

Updated Outline Dimensions ....................................................... 19

Changes to Ordering Guide .......................................................... 22

6/11—Rev. A to Rev. B

Deleted ADM8694......................................................... Throughout

Updated Figure 11, Figure 12, and Figure 13................................ 9

Updated Outline Dimensions ....................................................... 18

Data Sheet

Power-Fail Warning Comparator............................................. 14

Applications Information .............................................................. 15

Increasing the Drive Current.................................................... 15

Using a Rechargeable Battery for Backup ............................... 15

Adding Hysteresis to the Power-Fail Comparator ................. 15

Monitoring the Status of the Battery ....................................... 15

Alternate Watchdog Input Drive Circuits ............................... 16

Typical Applications....................................................................... 17

ADM8690 Applications............................................................. 17

ADM8691/ADM8695 Applications......................................... 17

RESET Output ............................................................................ 18

Power-Fail Detector ................................................................... 18

RAM Write Protection............................................................... 18

Watchdog Timer......................................................................... 18

Outline Dimensions ....................................................................... 19

Ordering Guide .......................................................................... 22

9/06—Rev. 0 to Rev. A

Updated Format..................................................................Universal

Changes to Absolute Maximum Ratings........................................6

Updated Ordering Guide .............................................................. 20

2/97—Revision 0: Initial Version

Rev. C | Page 2 of 24

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