ACE809

                                                                                           ACE809                                               Technology Description 3-Pin Microprocessor Reset Circuits The ACE809 microprocessor supervisory circuits can be used to monitor the power supplies in microprocessor and digital systems. They provide s reset to the microprocessor during power-up, power-down and brown-out conditions. The function of the ACE809 is to monitor the VCC supply voltage, and assert a reset signal whenever this voltage declines below the factory-programmed reset threshold. The reset signal remains asserted for 240ms after VCC rises above the threshold. The ACE809 has an active-low RESET output. The output of the ACE809 is guaranteed valid down to VCC =1V. The device is available in a SOT-23-3L package. The ACE809 is optimized to reject fast transient glitches on the VCC line. Low supply current of 25µA, (VCC=3.3V) makes these devices suitable for battery powered applications. Features Precision Vcc Monitor for 3.0V,3.3V and 5.0V Supplies 140ms Guaranteed Minimum RESET Output Duration RESET Output Guaranteed to Vcc=1.0V Low 25μA Supply Current. Vcc Transient Immunity. No External Components. Application Embedded systems Computers Critical μP Power Supply Monitoring Battery Powered equipment Absolute Maximum Ratings Parameter Symbol Max Unit Supply Voltage VCC 5.5 V Output Voltage RESET -0.3 to (Vcc+0.3) V Input Current 20 mA Output ...