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ILC1832 Datasheet(PDF) 1 Page - Impala Linear Corporation

Part No. ILC1832
Description  μP SUPERVISORY CIRCUIT
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Maker  IMPALA [Impala Linear Corporation]
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ILC1832 Datasheet(HTML) 1 Page - Impala Linear Corporation

   
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ILC1832
µP Supervisory Circuit
Impala Linear Corporation
Impala Linear Corporation
1
(408) 574-3939
www.impalalinear.com
October 1999
ILC1832 1.1
The ILC1832 is a multifunction circuit which monitors micro-
processor activity, external reset and power supplies in
microprocessor based systems.
Ths circuit functions
include a watchdog timer, power supply monitor, micro-
processor reset, and manual pushbutton reset input.
The power supply line is monitored with a comparator and
an internal voltage reference. RST is forced low when an
out-of-tolerance condition exists and remains asserted for
at least 250ms after VCC rises above the threshold voltage
(2.55V or 2.88V). The RST pin will remain logic low with
VCC as low as 1.4V.
The Watchdog input (ST) monitors µP activity and will assert
RST if no µP activity has occurred within the watchdog time-
out period. The watchdog timeout period is selectable with
nominal periods of 150, 600, or 1200 milliseconds.
Power OK/Reset Time Delay, 250ms min.
Watchdog Timer, 150 ms, 600ms, or 1.2s Typical
Precision Supply Voltage Monitor, Select Between 5%
or 10% of Supply Voltage
18µA Supply Current
Debounced External Reset Input
8-Pin SOIC or DIP Package
Computers
Controllers
Critical Microprocessor Power Monitoring
Intelligent Instruments
Portable Equipment
ILC1832
V
CC
Top View
PBRST
RST
TD
2
1
8
6
RST
GND
ST
TOL
4
3
5
7
ETC1832N - 8 Lead Plastic DIP Package
ETC1832M - 8 Lead Plastic SOIC Package
ILC1832
µµP
V
CC
V
CC
V
CC
ST
RESET
PBRST
RST
TD
GND
TOL
I/O
Part
Package
Temp. Range
ILC1832N
8-Lead PDIP
-40°C to +85°C
ILC1832M
8-Lead SOIC
-40°C to +85°C
General Description
Features
Applications
Ordering Information
Typical Circuit
Pin-Package Configurations
Preliminary


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