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MIC70 Datasheet

  • MIC70

  • Micrel Semiconductor [レP Supervisory Circuits]

  • 176.95KB

  • MICREL   MICREL

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MIC705/6/7/8 碌P Supervisory Circuits
MIC705/6/7/8
碌P Supervisory Circuits
Description
The MIC705/MIC706/MIC707/MIC708 are inexpensive
microprocessor supervisory circuits that monitor power
supplies in microprocessor based systems. The circuit
functions include a watchdog timer, microprocessor
reset, power failure warning and a debounced manual
reset input.
The MIC705 and MIC706 offer a watchdog timer
function while the MIC707 and MIC708 have an active
high reset output in addition to the active low reset
output.
Supply voltage monitor levels of 4.65V and 4.4V are
available. The MIC705/MIC707 have a nominal reset
threshold level of 4.65V while the MIC706 and MIC708
have a 4.4V nominal reset threshold level. When the
supply voltage drops below the respective reset
threshold level, RESET is asserted.
Pin Configuration
Top View
MR
V
CC
GND
PFI
1
2
3
4
8
WDO
RESET
WDI
PFO
MIC705
MIC706
7
6
5
N Package - 8 Lead Plastic DIP Package
M Package - 8 Lead Plastic SOIC Package
MR
V
CC
GND
PFI
1
2
3
4
8
RESET
RESET
NC
PFO
MIC707
MIC708
7
6
5
Features
路
Debounced Manual Reset Input is
Typical Applications
路
Automotive Systems
路
Intelligent Instruments
路
Critical Microprocessor Power Monitoring
路
Printers
路
Computers
路
Controllers
Ordering Information
Part
MIC70_N
MIC70_M
Package
8-Lead PDIP
8-Lead SOIC
Temp. Range
-40擄C to +85擄C
-40擄C to +85擄C
路
Reset Pulse Width, 200ms
路
Watchdog Timer, 1.6s (MIC705/MIC706)
路
4.4V or 4.65V Precision Voltage Monitor
路
Early Power Fail Warning
or Low Battery
Detect
TTL/CMOS Compatible
Typical Operating Circuit
+5V (Regulated)
Manual
Reset
MR
VCC
VCC
RESET
DC Voltage
(Unregulated)
MIC705
MIC706
RESET
碌P
I/O Line
NMI
Interrupt
WDI
WDO
PFI
PFO
1

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