APX811_09 Datasheet, PDF (1/10 Pages) Diodes Incorporated – 4-Pin Microprocessor Supervisor With Manual Reset

APX811/812
4-Pin Microprocessor Supervisor With Manual Reset
Features
General Description
• 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.
Applications
• Computers
• Controllers
• Intelligent Instruments
• Critical uP and UC power Monitoring
• Portable/Battery powered Equipment
• Automotive
Typical Application Circuit
Vcc
(Manual Reset)
Push Botton
Vcc
APX811/APX812
MR
RESET
(RESET)
GND
Vcc
MCU
RESET Input
GND
APX811/812 Rev. 2
DS31960
1 of 10
www.diodes.com
OCTOBER 2009
© Diodes Incorporated