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参数资料
| 型号： | ILC1232N |
| 厂商： | Impala Linear Corporation |
| 英文描述： | mP Supervisory Circuit |
| 中文描述： | 手机监控电路 |
| 文件页数： | 1/5页 |
| 文件大小： | 75K |
| 代理商： | ILC1232N |
ILC1232
mP Supervisory Circuit
Impala Linear Corporation
ILC1232 1.1
1
(408) 574-3939
www.impalalinear.com
Sept 1999
Impala Linear Corporation
1
The ILC1232 is a multifunction circuit which monitors micro-
processor activity, external reset and power supplies in
microprocessor based systems. The 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 V
CC
rises above the threshold voltage
(4.5V or 4.75V). The RST pin will remain logic low with V
CC
as low as 1.4V.
The Watchdog input (ST) monitors mP activity and will
assert RST if no mP activity has occurred within the watch-
dog timeout period. The watchdog timeout period is selec-
table with nominal periods of 150, 600, or 1200 milliseconds.
Power OK/Reset Time Delay, 250ms min.
Watchdog Timer, 150ms, 600ms, or 1.2s typical
Precision Supply Voltage Monitor, Select Between 5% or
10% of Supply Voltage
18
μ
A Supply Current
Debounced External Reset Input
8-Pin SO Package
Computers
Controllers
Critical Microprocessor Power Monitoring
Intelligent Instruments
Portable Equipment
ILC1232
V
CC
Top View
PBRST
RST
TD
2
1
8
6
RST
GND
ST
TOL
4
3
5
7
ETC1232N - 8 Lead Plastic DIP Package
ETC1232M - 8 Lead Plastic SOIC Package
Part
ILC1232N
ILC1232M
Package
8-Lead PDIP
8-Lead SOIC
Temp. Range
-40°C to +85°C
-40°C to +85°C
Ordering Information
ILC1232
μ
P
V
CC
V
CC
V
CC
ST
RESET
PBRST
RST
TD
GND
TOL
I/O
Typical Circuit
Pin Package Configurations
General Description
Features
Applications
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