General Description
The MAX696/MAX697 supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery-control functions in microprocessor (μP) systems. These include μP reset and backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning. The MAX696/MAX697 significantly improve system reliability and accuracy compared to that obtained with separate ICs or discrete components.

Features
● Adjustable Low-Line Monitor and Power-Down Reset
● Power-OK/Reset Time Delay
● Watchdog Timer—100ms, 1.6s, or Adjustable
● Minimum Component Count
● 1μA Standby Current
● Battery-Backup Power Switching (MAX696)
● On-Board Gating of Chip-Enable Signals (MAX697)
● Separate Monitor for Power-Fail or Low-Battery Warning

Applications
● Computers
● Controllers
● Intelligent Instruments
● Critical μP Power Monitoring