ADM1232

FEATURES Pin-compatible with MAX1232 and Dallas DS1232 Adjustable precision voltage monitor with 4.5 V and 4.75 V options Adjustable strobe monitor with 150 ms, 600 ms, or 1.2 sec options No external components Specified from −40°C to +85°C APPLICATIONS Microprocessor systems Portable equipment Computers Controllers Intelligent instruments Automotive systems GENERAL DESCRIPTION The ADM1232 is pin-compatible with the MAX1232, DS1232LP, and DS1232. The Analog Devices, Inc., ADM1232 is a microprocessor monitoring circuit that can monitor the following: Microprocessor supply voltage Whether a microprocessor has locked up External interrupts 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). Microprocessor Supervisory Circuit ADM1232 RESET GENERATOR 07522-001 FUNCTIONAL BLOCK DIAGRAM VCC TOLERANCE 5%/10% TOLERANCE SELECT RESET PB RESET TD GND VREF DEBOUNCE WATCHDOG TIME-BASE SELECT Figure 1. WATCHDOG TIMER ADM1232 RESET STROBE 5V ADM1232 STROBE RESET GND TD TOLERANCE 5V 10kΩ MICROPROCESSOR I/O RESET Figure 2. Typical Supply Monitoring Application 07522-002 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 rights of third parties that may result from its use. Specifications subject to change without notice. No lic...