Microprocessor Supervisory Circuit ADM1232 FEATURES FUNCTIONAL BLOCK DIAGRAM Pin-compatible with MAX1232 and Dallas DS1232 5%/10% V RESET CC TOLERANCE Adjustable precision voltage monitor with 4.5 V and TOLERANCE SELECT 4.75 V options VREF Adjustable strobe monitor with 150 ms, 600 ms, or RESET 1.2 sec options PB RESET DEBOUNCE No external components WATCHDOG WATCHDOG STROBE TD TIMER Specified from 40C to +85C TIME-BASE SELECT GND ADM1232 APPLICATIONS Figure 1. Microprocessor systems Portable equipment Computers Controllers Intelligent instruments Automotive systems GENERAL DESCRIPTION 5V 5V The ADM1232 is pin-compatible with the MAX1232, DS1232LP, 10k and DS1232. The Analog Devices, Inc., ADM1232 is a micro- processor monitoring circuit that can monitor the following: ADM1232 MICROPROCESSOR Microprocessor supply voltage STROBE I/O Whether a microprocessor has locked up RESET RESET External interrupts GND TD TOLERANCE The ADM1232 is available in four packages: an 8-lead MSOP (RM-8), an 8-lead PDIP (N-8), a 16-lead wide SOIC (RW-16), and an 8-lead narrow SOIC (R-8). Figure 2. Typical Supply Monitoring Application Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 19972008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. RESET GENERATOR 07522-002 07522-001ADM1232 TABLE OF CONTENTS Features .............................................................................................. 1 Pin Configurations and Function Descriptions ............................5 Applications ....................................................................................... 1 Circuit Information ...........................................................................6 Functional Block Diagram .............................................................. 1 PB RESET .......................................................................................6 General Description ......................................................................... 1 STROBE Timeout Selection .........................................................6 Revision History ............................................................................... 2 Tolerance ........................................................................................6 Specif icat ions ..................................................................................... 3 RESET RESET and Outputs .........................................................6 Absolute Maximum Ratings ............................................................ 4 Outline Dimensions ..........................................................................7 Thermal Resistance ...................................................................... 4 Ordering Guide .............................................................................9 ESD Caution .................................................................................. 4 REVISION HISTORY 12/08Rev. B to Rev. C Updated Format .................................................................. Universal Changes to Table 2 ............................................................................ 4 Added Thermal Resistance Section ............................................... 4 Updated Outline Dimensions ......................................................... 7 Changes to Ordering Guide ............................................................ 9 12/97Rev. A to Rev. B Changes to Specifications Section .................................................. 2 x/97Rev. 0 to Rev. A Changes to Specifications Section .................................................. 2 7/97Revision 0: Initial Version Rev. C Page 2 of 12