The ADM696/ADM697 supervisory circuits offer complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include μP reset， backup-battery switchover， watchdog timer， CMOS RAM write protection， and power failure warning. The ADM696/ADM697 are available in 16-pin DIP and small outline packages and provide the following functions： 1. Power-On Reset output during power-up， power-down and brownout conditions. The RESET voltage threshold is adjustable using an external voltage divider. The RESET output remains operational with VCC as low as 1 V. 2. A Reset pulse if the optional watchdog timer has not been toggled within specified time. 3. Separate watchdog time-out and low line status outputs. 4. Adjustable reset and watchdog timeout periods. 5. A 1.3 V threshold detector for power fail warning， low battery detection， or to monitor a power supply other than VCC. 6. Battery backup switching for CMOS RAM， CMOS microprocessor or other low power logic （ADM696）。 7. Write protection of CMOS RAM or EEPROM （ADM697）..