Dual Voltage Monitor With Integrated CPU Supervisor And System Battery Switch
The X40420 X40421 combines power-on reset control, watchdog Timer supply voltage supervision, and secondary supervision, manual reset, and Block Lock protect serial EEPROM in one package. This combination lowers system cost, reduces board space requirements, and increases reliability.
Applying voltage to VCC activates the power-on reset circuit which holds RESET/RESET active for a period of time. This allows the power supply and system Oscillator to stabilize before the processor CAN execute code.
By Intersil Corporation
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