DESCRIPTION
The M48T02/12TIMEKEEPER RAM is a 2Kb x8 non-volatile static RAM and real time clock which is pin and functional compatible with the DS1642.
   
■ INTEGRATED ULTRA LOW POWER SRAM,
    REAL TIME CLOCK and POWER-FAIL
    CONTROLCIRCUIT
■ BYTEWIDE™ RAM-LIKECLOCK ACCESS
■ BCD CODED YEAR, MONTH, DAY, DATE,
    HOURS, MINUTES and SECONDS
■ TYPICAL CLOCK ACCURACY of ± 1 MINUTE
    a MONTH, AT 25°C
■ SOFTWARE CONTROLLED CLOCK
    CALIBRATION for HIGH ACCURACY
    APPLICATIONS
■ AUTOMATICPOWER-FAILCHIPDESELECTand
    WRITEPROTECTION
■ WRITE PROTECT VOLTAGES
    (VPFD = Power-fail Deselect Voltage):
    – M48T02: 4.5V ≤ VPFD ≤ 4.75V
    – M48T12: 4.2V ≤ VPFD ≤ 4.5V
■ SELF-CONTAINED BATTERY and CRYSTAL
    in the CAPHAT DIP PACKAGE
■ PIN and FUNCTION COMPATIBLE with
    JEDEC STANDARD 2Kb x8 SRAMs