SUMMARY DESCRIPTION
The M48T512Y/V TIMEKEEPER® RAM is a 512Kb x 8 non-volatile static RAM and real time clock organized as 524,288 words by 8 bits. The special DIP package provides a fully integrated battery back-up memory and real time clock solution.
   
FEATURES SUMMARY
■ INTEGRATED ULTRA LOW POWER SRAM,
    REAL TIME CLOCK, POWER-FAIL
    CONTROL CIRCUIT, BATTERY, AND
    CRYSTAL
■ BCD CODED YEAR, MONTH, DAY, DATE,
    HOURS, MINUTES, AND SECONDS
■ AUTOMATIC POWER-FAIL CHIP
    DESELECT and WRITE PROTECTION
■ WRITE PROTECT VOLTAGES:
    (VPFD = Power-fail Deselect Voltage)
    – M48T512Y: VCC = 4.5 to 5.5V
        4.2V ≤ VPFD ≤ 4.5V
    – M48T512V*: VCC = 3.0 to 3.6V
        2.7V ≤ VPFD ≤ 3.0V
■ CONVENTIONAL SRAM OPERATION;
    UNLIMITED WRITE CYCLES
■ SOFTWARE CONTROLLED CLOCK
    CALIBRATION FOR HIGH ACCURACY
    APPLICATIONS
■ 10 YEARS OF DATA RETENTION AND
    CLOCK OPERATION IN THE ABSENCE OF
    POWER
■ PIN AND FUNCTION COMPATIBLE WITH
    INDUSTRY STANDARD 512K x 8 SRAMS
■ SELF-CONTAINED BATTERY AND
    CRYSTAL IN DIP PACKAGE