APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
General Description
Features
The APX811/812 are used for microprocessor supervisory circuit
to monitor the power supplies in These circuit perform a single
function: they assert a reset signal whenever the Vcc supply
voltage declines below a preset threshold, keeping it asserted for
at least 240ms after Vcc has risen above the reset threshold.
Reset thresholds suitable for operation with a variety of supply
voltages are available. The APX811/812 have push-pull outputs.
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Precision Monitor of(2.5V/3.0V/3.3V/5.0V) power
supply voltage
Full specified over temperature
Manual reset input
Available in four output configuration
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Push-pull
Active low(APX811)
RESET
•
•
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Push-pull RESET Active high(APX812)
Power-on reset generator with fixed delay time 200ms
SOT143: Available in “Green” Molding Compound
(No Br, Sb)
The APX811 has an active low
output, while the
RESET
APX812 has an active high RESET output.
The APX811/812 devices incorporate a manual reset input,
.
MR
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Lead Free Finish/RoHS Compliant (Note 1)
A low level at
causes RESET to become active.
MR
The APX811/2 are targeted at 2.5V, 3V, 3.3V and 5V powered
systems and are available with different threshold voltages to
meet the exact needs of the system. They are available in the
space saving SOT143 package and operate over the whole
industrial temperature range, -40 to 85°C.
Applications
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•
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Computers
Controllers
Intelligent Instruments
Critical uP and UC power Monitoring
Portable/Battery powered Equipment
Automotive
Typical Application Circuit
Vcc
Vcc
Vcc
APX811/APX812
MCU
RESET
(RESET)
MR
RESET Input
(Manual Reset)
Push Botton
GND
GND
APX811/812 Rev. 2
DS31960
1 of 10
www.diodes.com
OCTOBER 2009
© Diodes Incorporated