View max6326 datasheet:

19-1294; Rev 3; 1/00 3-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits General Description Features The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/ ¦ Ultra-Low 1µA (max) Supply Current MAX6348 microprocessor (µP) supervisory circuits moni- (MAX6326/MAX6327/MAX6328) tor the power supplies in µP and digital systems. These ¦ Precision Monitoring of 2.5V, 3V, 3.3V, and 5V devices provide excellent circuit reliability and low cost Power-Supply Voltages by eliminating external components and adjustments ¦ Reset Thresholds Available from 2.2V to 4.63V when used with 2.5V, 3V, 3.3V, and 5V powered circuits. ¦ Fully Specified Over Temperature These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines ¦ 100ms (min) Power-On Reset Pulse W