Microprocessor
Supervisory Circuit
ADM1232
APPLICATIONS
FUNCTIONAL BLOCK DIAGRAM
VCC
TOLERANCE
5%/10%
TOLERANCE
SELECT
VREF
PB RESET
RESET
DEBOUNCE
TD
RESET
WATCHDOG
TIME-BASE
SELECT
WATCHDOG
TIMER
STROBE
07522-001
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
RESET
GENERATOR
FEATURES
ADM1232
GND
Figure 1.
Microprocessor systems
Portable equipment
Computers
Controllers
Intelligent instruments
Automotive systems
GENERAL DESCRIPTION
5V
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).
10kΩ
ADM1232
STROBE
RESET
GND
MICROPROCESSOR
I/O
RESET
TD TOLERANCE
07522-002
•
•
•
5V
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
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©1997–2008 Analog Devices, Inc. All rights reserved.
