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APX803-23SA Datasheet(PDF) 1 Page - Diodes Incorporated

Part No. APX803-23SA
Description  er3-PIN MICROPROCESSOR RESET CIRCUIT
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Maker  DIODES [Diodes Incorporated]
Homepage  http://www.diodes.com
Logo DIODES - Diodes Incorporated

APX803-23SA Datasheet(HTML) 1 Page - Diodes Incorporated

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APX803/D
3-PIN MICROPROCESSOR RESET CIRCUIT
APX803
Document number: DS32132 Rev. 2 - 2
1 of 11
www.diodes.com
September 2010
© Diodes Incorporated
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 VCC supply voltage
declines below a preset threshold, keeping it asserted for a
fixed period of time after VCC 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 VCC, and
the outputs are guaranteed to be in the correct logic state for
VCC 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 )
1
2
GND
VCC
APX803
2
3
RESET
SOT23
( Top View )
1
2
GND
VCC
APX803
2
3
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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