MIC706P Datasheet, PDF (1/8 Pages) Micrel Semiconductor – μP Supervisory Circuits

MIC706P/R/S/T, MIC708R/S/T µP Supervisory Circuits
MIC706P/R/S/T, MIC708R/S/T
µP Supervisory Circuits
Description
The MIC706P/R/S/T and MIC708R/S/T are inexpensive
microprocessor supervisory circuits that monitor power
supplies in 3.0 and 3.3 Volt microprocessor based
systems. The circuit functions include a watchdog timer,
microprocessor reset, power failure warning and a
debounced manual reset input.
The MIC706 offers a watchdog timer function, while the
MIC708 has no watchdog timer but has an active high
reset output in addition to the active low reset output.
The R, S, and T versions are similar in all respects
except for supply voltage reset threshold levels. The
threshold levels are 2.63, 2.93, and 3.08V respectively.
When the supply voltage drops below the reset
threshold level, RESET (and RESET for the MIC708) is
asserted.
The MIC706P is identical to the MIC706R, except that
the Reset output is asserted high.
Typical Applications
· ^{Laptop Computers}
· ^{Intelligent Instruments}
· ^{Critical Microprocessor Power Monitoring}
· ^Printers
· ^Computers
· ^Controllers
Pin Configuration
Top View
MR 1
VCC 2
GND 3
PFI 4
MIC706
8 WDO
RESET
7
(RESET for MIC706P)
6 WDI
5 PFO
N Package - 8 Lead Plastic DIP Package
M Package - 8 Lead Plastic SOIC Package
MR 1
VCC 2
GND 3
PFI 4
MIC708
8 RESET
7 RESET
6 NC
5 PFO
Features
· ^{30µA Maximum Supply Current}
· ^{Debounced Manual Reset Input is}
TTL/CMOS Compatible
· ^{Reset Pulse Width, 200ms}
· ^{Watchdog Timer, 1.6s (MIC706)}
· ^{Precision Supply Voltage Monitor}
· ^{Early Power Fail Warning or Low Battery}
Detect
Typical Operating Circuit
Ordering Information
Part
MIC70_ _N
MIC70_ _M
Package
8-Lead PDIP
8-Lead SOIC
Temp. Range
-40°C to +85°C
-40°C to +85°C
+3.0 or +3.3V (Regulated)
Manual
Reset
DC Voltage
(Unregulated)
VCC
MR RESET
MIC706
WDI
WDO
PFI
PFO
VCC
RESET
µP
I/O Line
NMI
Interrupt
1