DESCRIPTION
The X40620 combines several functions into one device. The first is a dual voltage monitoring, power-on reset control, watchdog timer and 64Kbit serial EEPROM memory in one package. This combination lowers system cost, reduces board space requirements, and increases reliability.

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 CMOS
   —10µA typical standby current, watchdog on
   —400µA typical standby current, watchdog off
• 64kbit 2-Wire Serial EEPROM
   —1MHz serial interface speed
   —64-byte page write mode
   —Self-timed write cycle
   —5ms write cycle time (typical)
• 2.5 to 3.7V Power Supply Operation
• 8-Lead TSSOP package