View ds1233d datasheet:

DS1233D 5V EconoReset www.dalsemi.com FEATURES PIN ASSIGNMENT Automatically restarts microprocessor after power failure DALLAS DS1233 Maintains reset for 350 ms after VCC returns Econo Reset to an in-tolerance condition Accurate 5%, 10% or 15% microprocessor 5V power supply monitoring Reduces need for discrete components Precision temperature-compensated voltage 1 reference and voltage sensor 1 2 3 Low-cost TO-92 package or surface mount SOT-223 package 1 2 3 Internal 5 k? pull-up resistor 2 4 3 Compatible with Motorola 68XXX series and TO-92 PACKAGE SOT-223 PACKAGE HC16 Microprocessors See Mech. See Mech. Drawings Section Drawings Section Operating temperature of -40°C to +85°C PIN DESCRIPTION PIN 1 GROUND PIN 2 RESET PIN 3 VCC PIN 4 GROUND (SO