Diodes APX811/812 User Manual download pdf

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,

A low level at

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

RESET

(RESET)

RESET Input

GND

APX811/APX812

Vcc

GND

Vcc

(Manual Reset)

Push Botton

Features

General Description

Applications

1 2 3 4 5 6 7 8 9 10

APX811/812 1

Summary of Contents

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APX811/812 4-Pin Microprocessor Supervisor With Manual Reset APX811/812 Rev. 2 1 of 10

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