參數(shù)資料
型號(hào): MIC1232N
廠商: MICREL INC
元件分類: 電源管理
英文描述: レP Supervisory Circuit
中文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8
封裝: DIP-8
文件頁(yè)數(shù): 1/8頁(yè)
文件大?。?/td> 162K
代理商: MIC1232N
1
The MIC1232 is a multifunction circuit which monitors
microprocessor activity, external reset and power
supplies in microprocessor based systems. The circuit
functions include a watchdog timer, power supply
monitor, microprocessor 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
μ
P activity and will
assert RST if no
μ
P activity has occurred within the
watchdog timeout period. The watchdog timeout period
is selectable with nominal periods of 150, 600, or 1200
milliseconds.
1
2
3
4
TD
TOL
GND
8
7
6
5
V
CC
RST
RST
MIC1232
PBRST
ST
MIC1232N - 8 Lead Plastic DIP Package
MIC1232M - 8 Lead Plastic SOIC Package
Part
MIC1232N
MIC1232M
Package
8-Lead PDIP
8-Lead SOIC
Temp. Range
-40°C to +85°C
-40°C to +85°C
·
Automotive Systems
·
Intelligent Instruments
·
Critical Microprocessor Power Monitoring
·
Battery Powered Computers
·
Controllers
·
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
·
Available in 8-pin Surface Mount (SO)
·
Debounced External Reset Input
·
Low Supply Current,
<
18
μ
A Typ.
VCC
RST
μP
RESET
VCC
MIC1232
VCC
PBRST
TOL GND
ST
I/O
TD
Typical Operating Circuit
Features
Description
Pin Configuration
Ordering Information
Typical Applications
Top View
MIC1232
μP Supervisory Circuit
MIC1232
μP Supervisory Circuit
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