APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
APX811/812 Rev. 2 1 of 10 OCTOBER 2009
DS31960 www.diodes.com © Diodes Incorporated
• 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
• Push-pull
RESET
Active low(APX811)
• Push-pull RESET Active high(APX812)
• Power-on reset generator with fixed delay time 200ms
• SOT143: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)
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.
The APX811 has an active low
RESET
output, while the
APX812 has an active high RESET output.
The APX811/812 devices incorporate a manual reset input,
MR
.
A low level at
MR
causes RESET to become active.
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.
• Computers
• Controllers
• Intelligent Instruments
• Critical uP and UC power Monitoring
• Portable/Battery powered Equipment
• Automotive
Typical Application Circuit
Vcc
MCU
MR
RESET
(RESET)
RESET Input
GND
APX811/APX812
Vcc
GND
Vcc
(Manual Reset)
Push Botton
Features
General Description
Applications
