Processor Supervisor 4.38V 4.5V to 5.5V 8-Pin SOIC T/R

These devices combine four popular functions, Power-on Reset Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock Protect Serial EEPROM Memory in one package. This combination lowers system cost, reduces board space requirements, and increases reliability. The Watchdog Timer 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 RESET/RESET signal. The user selects the interval from three preset values. Once selected, the interval does not change, even after cycling the power.

• Selectable watchdog timer
• Low VCC detection and reset assertion
  • Five standard reset threshold voltages -
  • Re-program low VCC reset threshold voltage using special programming sequence
  • Reset signal valid to VCC = 1V
• Determine watchdog or low voltage reset with a volatile flag bit
• Long battery life with low power consumption