Diodes APX803/D Manuel d'utilisateur télécharger pdf

APX803/D

3-PIN MICROPROCESSOR RESET CIRCUIT

APX803

Document number: DS32132 Rev. 2 - 2

1 of 11

www.diodes.com

September 2010

Description

The APX803/D is used for microprocessor (µP) supervisory

circuits to monitor the power supplies in µP and digital

systems. They provide excellent circuit reliability and low cost

by eliminating external components and adjustments when

used with +5V, +3.3V, +3.0V powered circuits.

These circuits perform a single function: they assert a reset

signal on power up and whenever the V

supply voltage

declines below a preset threshold, keeping it asserted for a

fixed period of time after V

has risen above the reset

threshold. For the APX803D this period is a minimum of 1ms

while for other APX803 variants it is at least 140ms. The reset

comparator is designed to ignore fast transients on V

, and

the outputs are guaranteed to be in the correct logic state for

down to 1V.

The APX803 is available with different reset thresholds

suitable for operation with a variety of supply voltages,

however the APX803D is available with a 2.93V threshold

voltage.

The APX803/D have an open collector active low

RESET

output and compliment Diodes APX809/10 which have push-

pull output stages.. Low supply current makes the APX803/D

ideal for use in portable equipment. The APX803/D are

available in two pin out variants of the 3-pin SOT23 package.

Pin Assignments

( Top View )

GND

APX803

RESET

SOT23

( Top View )

GND

APX803

RESET

SOT23R

Features

• Precision Monitoring of +2.5V, +3V, +3.3V, and +5V

Power-Supply Voltages

• Fully Specified Over Temperature

• Open-drain

RESET

Active Low

• Power-On/power supply glitch Reset Pulse

• APX803D 2ms (Typ)

• APX803 200ms (Typ)

• 30µA Supply Current (Typ.)

• Guaranteed Reset Valid to VCC = +1V

• No External Components

• SOT23 and SOT23R: Available in “Green” Molding

Compound (No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 1)

Applications

• Computers

• Controllers

• Intelligent Instruments

• Critical µP and µC Power Monitoring

• Portable/Battery Powered Equipment

Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/products/lead_free.html.

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Résumé du contenu

Page 1 - APX803/D

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Page 2

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Page 3 - Absolute Maximum Ratings

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Page 4 - Electrical Characteristics (T

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Page 5 - RESET Timeout Period(ms)

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Page 6 - Figure 9 Figure 10

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Page 7

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Page 8

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Page 9 - ( Top View )

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Page 10 - APX803

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Page 11

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