adm1232arm-reel Analog Devices, Inc., adm1232arm-reel Datasheet

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adm1232arm-reel

Manufacturer Part Number
adm1232arm-reel
Description
Microprocessor Supervisory Circuit
Manufacturer
Analog Devices, Inc.
Datasheet
a
GENERAL DESCRIPTION
The ADM1232 is a superior, pin-compatible upgrade for the
MAX1232 and the DS1232LP and DS1232. The Analog
Devices ADM1232 is a microprocessor monitoring circuit that
can monitor:
1. Microprocessor Supply Voltage.
2. Whether a Microprocessor has locked-up.
3. An External Interrupt.
The ADM1232 is available in four different packages:
1. The ADM1232ARM in an 8-lead microSOIC (RM-8).
2. The ADM1232AN in an 8-lead PDIP (N-8).
3. The ADM1232ARW in a 16-lead wide SOIC (R-16).
4. The ADM1232ARN is an 8-lead narrow SOIC (R-8).
REV. B
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
Superior Upgrade for MAX1232 and Dallas DS1232
Low Power Consumption (500 A max)
Adjustable Precision Voltage Monitor with +4.5 V and
Adjustable STROBE Monitor with 150 ms, 600 ms or
APPLICATIONS
Microprocessor Systems
Portable Equipment
Computers
Controllers
Intelligent Instruments
Automotive Systems
Protection Against Damage Caused by P Failure
No External Components
+4.75 V Options
1.2 sec Options
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
TOLERANCE
PB RESET
Figure 1. Typical Supply Monitoring Application
GND
V
TD
CC
GND
TOLERANCE
FUNCTIONAL BLOCK DIAGRAM
WATCHDOG
DEBOUNCE
TIMEBASE
ADM1232
SELECT
5%/10%
SELECT
TD
ADM1232
ADM1232
+5V
TOLERANCE
TOLERANCE
World Wide Web Site: http://www.analog.com
VREF
STROBE
STROBE
RESET
RESET
Supervisory Circuit
ADM1232
+5V
Microprocessor
10k
MICROPROCESSOR
RESET
GENERATOR
I/O
© Analog Devices, Inc., 1997
RESET
ADM1232
WATCHDOG
TIMER
RESET
RESET

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adm1232arm-reel Summary of contents

Page 1

... Microprocessor Supply Voltage. 2. Whether a Microprocessor has locked-up External Interrupt. The ADM1232 is available in four different packages: 1. The ADM1232ARM in an 8-lead microSOIC (RM-8). 2. The ADM1232AN in an 8-lead PDIP (N-8). 3. The ADM1232ARW in a 16-lead wide SOIC (R-16). 4. The ADM1232ARN is an 8-lead narrow SOIC (R-8). REV. B Information furnished by Analog Devices is believed to be accurate and reliable ...

Page 2

ADM1232–SPECIFICATIONS P arameter TEMPERATURE POWER SUPPLY Voltage Current STROBE AND PB RESET INPUTS Input High Level Input Low Level INPUT LEAKAGE CURRENT (STROBE, TOLERANCE) TD OUTPUT CURRENT RESET RESET, RESET OUTPUT VOLTAGE RESET/RESET RESET/RESET High Level RESET/RESET Low Level 1 ...

Page 3

... Exposure to absolute maximum ratings for extended periods of time may affect device reliability. ORDERING GUIDE Temperature Model Range ADM1232ARM – +85 C ADM1232AN – +85 C ADM1232ARW – +85 C ADM1232ARN – ...

Page 4

ADM1232 Mnemonic Function PB RESET Push Button Reset Input. This debounced input will ignore pulses of less than 1 ms and is guaranteed to re- spond to pulses greater than 20 ms. Time Delay Set allows the user to select ...

Page 5

CIRCUIT INFORMATION PB RESET The PB RESET input makes it possible to manually reset a system using either a standard push-button switch or a logic low input. An internal debounce circuit provides glitch immunity when used with a switch, reducing ...

Page 6

ADM1232 16-Lead Wide SOIC (R-16) 0.4133 (10.50) 0.3977 (10.00 0.1043 (2.65) PIN 1 0.0118 (0.30) 0.0926 (2.35) 0.0040 (0.10) 0.0500 0.0192 (0.49) SEATING 0.0125 (0.32) (1.27) 0.0138 (0.35) PLANE BSC 0.0091 (0.23) 8-Lead microSOIC (RM-8) 0.122 ...

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