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APX803D-29SAG-7 Datasheet(PDF) 1 Page - Diodes Incorporated |
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APX803D-29SAG-7 Datasheet(HTML) 1 Page - Diodes Incorporated |
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1 / 11 page  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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