View ds1233 datasheet:

DS1233 5V EconoReset www.maxim-ic.com FEATURES PIN ASSIGNMENT Automatically restarts microprocessor after power failure DALLAS DS1233 Monitors pushbutton for external override Econo Reset Internal circuitry debounces pushbutton switch Maintains reset for 350ms after VCC returns to an in-tolerance condition or pushbutton released 1 Accurate 5%, 10%, or 15% microprocessor 1 2 3 5V power supply monitoring Reduces need for discrete components 1 2 3 Precision temperature-compensated voltage 2 4 3 reference and voltage sensor BOTTOM VIEW TOP VIEW Low-cost TO-92 package or surface-mount TO-92 PACKAGE SOT-223 PACKAGE See Mech. See Mech. SOT-223 package Drawings Section Drawings Section Internal 5k pull-up resistor on Website on Website Operating tem