MIC1815 Datasheet, PDF (1/8 Pages) Micrel Semiconductor – Microprocessor Reset Circuit

MIC1815 Microprocessor Reset Circuit
MIC1815
Microprocessor Reset Circuit
Description
The MIC1815 is an inexpensive microprocessor
supervisory circuit that monitor power supplies in
microprocessor based systems.
The function of these devices is to assert a reset if the
power supply drops below a designated reset threshold
level. Several different reset threshold levels are
available to accomodate 10% or 20% drop in 3.3V
powered systems.
The MIC1815 has an active low RESET output. The
reset output is guaranteed to remain asserted for a
minimum of 100ms after VCC has risen above the
designated reset threshold level. The MIC1815 comes
in a 3-pin SOT-23 package.
Pin Configuration
Top View
RESET 1
MIC1815
VCC 2
3 GND
Typical Applications
· ^{Portable Equipment}
· ^{Intelligent Instruments}
· ^{Critical Microprocessor Power Monitoring}
· ^{Printers/Computers}
· ^Controllers
Reset Threshold
Voltage (V)
2.88
2.55
Device
Suffix
-10
-20
Features
· RESET Remains Valid with VCC as Low
as 1.4V
· ^{Precision Voltage Monitor for 10% or}
20% drop in 3.3V Power Supplies
· ^{Available in 3-Pin SOT23 Package}
· ^{9µA Supply Current}
· ^{100ms Minimum Reset Pulse Width}
· ^{No External Components Required}
Ordering Information
Part
MIC1815_U
Package
3-Lead SOT23
Temp. Range
-40°C to +85°C
Place the device suffix of desired reset threshold voltage from table above in
blank to complete the part number.
Typical Operating Circuit
8++
8++
MIC1815
4-5-6
8++
µP
4-5-6
1