Microprocessor
Supervisory Circuit
ADM1232
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Pin-compatible with MAX1232 and Dallas DS1232
Adjustable precision voltage monitor with 4.5 V and
4.75 V options
5%/10%
TOLERANCE
SELECT
V
RESET
CC
TOLERANCE
VREF
Adjustable strobe monitor with 150 ms, 600 ms, or
1.2 sec options
RESET
PB RESET
DEBOUNCE
No external components
Specified from −40°C to +85°C
WATCHDOG
TIMER
WATCHDOG
TIME-BASE
SELECT
STROBE
TD
ADM1232
GND
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,
and DS1232. The Analog Devices, Inc., ADM1232 is a micro-
processor monitoring circuit that can monitor the following:
10kΩ
ADM1232
MICROPROCESSOR
I/O
•
•
•
Microprocessor supply voltage
Whether a microprocessor has locked up
External interrupts
STROBE
RESET
GND TD TOLERANCE
RESET
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
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