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PDF ADM1232 Data sheet ( Hoja de datos )
| Número de pieza | ADM1232 | |
| Descripción | Microprocessor Supervisory Circuit | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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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 micro-
processor 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
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
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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.
1 page  
ADM1232
ABSOLUTE MAXIMUM RATINGS
TA = 25°C unless otherwise noted.
Table 2.
Parameter
VCC
Logic Inputs
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
Vapor Phase (60 sec)
Infrared (15 sec)
Power Dissipation
N-81
RW-16, RM-82
R-82
Rating
5.5 V
−0.3 V to VCC + 0.3 V
−65°C to +150°C
300°C
215°C
220°C
1000 mW
900 mW
900 μW
1 Derate by 13.5 mW/°C above 25°C.
2 Derate by 12 mW/°C above 25°C.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 3. Thermal Resistance
Package Type
8-Lead PDIP (N-8)
16-Lead SOIC_W (RW-16)
8-Lead MSOP (RM-8)
8-Lead SOIC_N (R-8)
θJA
100
73
206
153
Unit
°C/W
°C/W
°C/W
°C/W
ESD CAUTION
Rev. C | Page 4 of 12
5 Page 
ADM1232
NOTES
Rev. C | Page 10 of 12
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ADM1232.PDF ] | |
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