The X4283, X4285 combines four popular functions,Power-on Reset Control, Watchdog Timer, SupplyVoltage Supervision, and Block Lock protect serialEEPROM memory in one package. This combinationlowers system cost, reduces board space requirements,and increases reliability.Applying power to the device activates the power-onreset circuit which holds RESET/RESET active for aperiod of time. This allows the power supply and oscillatorto stabilize before the processor can execute code.