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                         Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the week, and Year with Leap-Year Compensation Valid Up to 2100


                         56-Byte, Battery-Backed, General-Purpose RAM with Unlimited Writes



                         I2C Serial Interface


                         Programmable Square-Wave Output Signal


                         Automatic Power-Fail Detect and Switch Circuitry


                         Consumes Less than 500nA in Battery-Backup Mode with Oscillator Running


                         Optional Industrial Temperature Range:

-40C to +85C

                         Available in 8-Pin Plastic DIP or SO


                         Underwriters Laboratories (UL) Recognized.