Outline

This IC combines the popular watchdog timer with a battery back-up, resulting in an IC that is easier to use. The watchdog timer has a built-in power ON reset function, and both the timer and the battery back-up section have low current consumption.

Features

1. Low current consumption 270µA typ.

2. Watchdog timer

Detection voltage 4.2V typ.

CT charging current -0.24µA typ.

3. CS

CS detection voltage 4.4V typ.

Output voltage low level 0.1V typ.

4. Battery back-up

Power supply switching voltage 3.3V typ.

Input/output voltage difference (normal) 0.3V typ.

Input/output voltage difference (back-up) 0.3V typ.

Loss current (current consumption for back-up) 0.1µA typ.

Applications

1. Fax machines

2. Photocopiers

3. Air conditioners

4. Control equipment

5. Sequencers, etc.