MK41T56 Datasheet PDF - STMicroelectronics

DESCRIPTION
The MK41T56 TIMEKEEPER® is a low power 512 bit static CMOS RAM organized as 64 words by 8 bits. A built-in 32.768 kHz oscillator (external crystal controlled) and the first 8 bytes of the RAM are used for the clock/calendar function and are configured in binary coded decimal (BCD) format.
   
â–  COUNTERS for SECONDS, MINUTES, HOURS, DAY, DATE, MONTH and YEARS
â–  SOFTWARE CLOCK CALIBRATION
â–  AUTOMATIC POWER-FAIL DETECT and SWITCH CIRCUITRY
â–  I2C BUS COMPATIBLE
â–  56 BYTES of GENERAL PURPOSE RAM
â–  ULTRA-LOW BATTERY SUPPLY CURRENT of 500nA
â–  OPERATING TEMPERATURE:
    – MK41T56: 0 to 70°C
    – MKI41T56: –40 to 85°C
â–  AUTOMATIC LEAP YEAR COMPENSATION