X40411

The X40411 combines power-on reset control,watchdog timer, supply voltage supervision, and secondary voltage supervision, and Block Lock™ protect serial EEPROM in one package. This combination lowers system cost, reduces board space requirements,and increases reliability.

Applying voltage of X40411  to V_CC activates the power-on reset circuit which holds RESET/RESET active for a period of time. This allows the power supply and system oscilla-Low V_CC detection circuitry protects the user's system from low voltage conditions, resetting the system when V_CC falls below the minimum VTRIP1 point. RESET/RESET is active until V_CC returns to proper operating level and stabilizes. A second voltage monitor circuit tracks the unregulated supply to provide a power fail warning or monitors different power supply voltage. Three common low voltage combinations of X40411 are available, however,Intersil's unique circuits allows the threshold for either voltage monitor to be reprogrammed to meet special needs or to fine-tune the threshold for applications requiring higher precision.

The Watchdog Timer of X40411 provides an independent protection mechanism for microcontrollers. When the microcontroller fails to restart a timer within a selectable time out interval, the device activates the WDO signal.The user selects the interval from three preset values.Once selected, the interval does not change, even after cycling the power.

The memory portion of the X40411 is a CMOS Serial EEPROM array with Intersil's Block Lock protection.The array is internally organized as x 8. The device features a 2-wire interface and software protocol allowing operation on an I²C^® bus.

The X40411 utilizes Intersil's proprietary Direct Write™ cell, providing a minimum endurance of 100,000 cycles and a minimum data retention of 100 years.