APX811/812 4-Pin Microprocessor Supervisor With Manual Reset Features General Description The APX811/812 are used for microprocessor supervisory circuit Precision Monitor of(2.5V/3.0V/3.3V/5.0V) power supply voltage to monitor the power supplies in These circuit perform a single function: they assert a reset signal whenever the Vcc supply Full specified over temperature voltage declines below a preset threshold, keeping it asserted for Manual reset input at least 240ms after Vcc has risen above the reset threshold. Available in four output configuration Reset thresholds suitable for operation with a variety of supply Push-pull Active low(APX811) RESET voltages are available. The APX811/812 have push-pull outputs. Push-pull RESET Active high(APX812) The APX811 has an active low RESET output, while the Power-on reset generator with fixed delay time 200ms APX812 has an active high RESET output. SOT143: Available in Green Molding Compound (No Br, Sb) The APX811/812 devices incorporate a manual reset input, MR . Lead Free Finish/RoHS Compliant (Note 1) 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 85C. Applications Computers Controllers Intelligent Instruments Critical uP and UC power Monitoring Portable/Battery powered Equipment Automotive Typical Application Circuit Vcc Vcc Vcc APX811/APX812 MCU RESET MR RESET Input (RESET) (Manual Reset) GND GND Push Botton APX811/812 Rev. 2 1 of 10 OCTOBER 2009 DS31960 www.diodes.com Diodes Incorporated APX811/812 4-Pin Microprocessor Supervisor With Manual Reset Ordering Information APX 8 XX - XX U G - 7 Green Enable Voltage Package Packing 11 : Active-Low 46 : 4.63 G : Green 7 : Tape & Reel U : SOT143 12 : Active-High 44 : 4.38 40 : 4.00 31 : 3.08 29 : 2.93 26 : 2.63 23 : 2.25 Package Packaging 7 Tape and Reel Device Code (Note 2) Quantity Part Number Suffix APX811-XXUG-7 U SOT143 3000/Tape & Reel -7 APX812-XXUG-7 U SOT143 3000/Tape & Reel -7 Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at