X40620

64K X40620 Dual Voltage CPU Supervisor with 64K Serial EEPROM EEPROM memory 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 active for a period of time. This allows the power supply and system oscillator to stabilize before the processor can execute code. Low VCC detection circuitry protects the user’s system from low voltage conditions, resetting the system when VCC falls below the set minimum Vtrip point. RESET is active until VCC returns to proper operating level and stabilizes. A second voltage monitor circuit (V2MON) tracks the unregulated supply to provide a power fail warning or monitors different power supply voltage. When the second monitored voltage drops below a preset V2TRIP voltage. V2FAIL is active until V2 returns to proper operating level and above the V2TRIP voltage. Five common low voltage combinations are available, however, Xicor’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. FEATURES Dual Voltage Detection and Reset Assertion —Three standard reset threshold settings. (3.1V/ 2.6V, 3.1V/1.7V, 2.9V/2.3V) —Adjust low voltage reset threshold voltages using special programming sequence —RESET signal valid down to VCC=1V Watchdog Timer (150ms) Power On Reset (150ms) Low Power CM...