X5083

This X5083 combines four popular functions, Power-on Reset Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock Serial EEPROM Memory in one package. This combination lowers system cost, reduces board space requirements, and increases reliability.

Applying power to the X5083 activates the power-on reset circuit which holdsRESET active for a period of time. This
allows the power supply and oscillator to stabilize before the processor can execute code.

The Watchdog Timer X5083 provides an independent protection mechanism for microcontrollers. When the microcontroller fails to restart a timer within a selectable time out interval, the device activates theRESET signal. The user selects the interval from three preset values. Once selected, the interval does not change, even after cycling the power.

The X5083's low V_CC detection circuitry protects the user's system from low voltage conditions, resetting the system when V_CC falls below the minimum V_CC trip point.RESET is asserted until V_CC returns to the proper operating level and stabilizes. Five industry standard V_TRIP thresholds are available, however, Intersil's unique circuits allow the threshold to be reprogrammed to meet custom requirements or to finetune the threshold for applications requiring higher precision.