S-35399A02

The S-35399A02 is a CMOS 2-wire real-time clock IC which operates with the very low current consumption and in the wide range of operation voltage. The operation voltage is 1.3 V to 5.5 V so that this IC S-35399A02 can be used for various power supplies from main supply to backup battery. Due to the 0.34 A current consumption and wide range of power supply voltage at time keeping, this IC makes the battery life longer. In the system which operates with a backup battery, the included free registers of S-35399A02 an be used as the function for user's backup memory. Users always can take back the information in the registers which is stored before power-off the main power supply, after the voltage is restored.

This IC S-35399A02 has the function to correct advance/delay of the clock data speed, in the wide range, which is caused by the oscillation circuit's frequency deviation. Correcting according to thetemperature change by combining this function and a temperature sensor, it is possible to make a high precise clock function which is not affected by the ambient temperature. This IC S-35399A02 has the function for the external microcomputer's sub clock to output the 32.768 kHz clock pulse. And for this output, users can select either of Nch open drain or CMOS.
 
Moreover, this IC S-35399A02 has a 24-bit binary up counter. This counter counts up every 60 sec from power-on so that users are able to grasp the elapsed time from power-on up to 30 years.