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SUMMARY DESCRIPTION

The M48T128Y/V TIMEKEEPER? RAM is a 128Kb x 8 non-volatile static RAM and real time clock. The special DIP package provides a fully integrated battery back-up memory and real time clock solution. The M48T128Y/V directly replaces industry standard 128Kb x 8 SRAM.

FEATURES SUMMARY

¡ö INTEGRATED, ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT, BATTERY, AND CRYSTAL

¡ö BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES, AND SECONDS

¡ö AUTOMATIC POWER-FAIL CHIP DESELECT AND WRITE PROTECTION

¡ö WRITE PROTECT VOLTAGES (VPFD = Power-fail Deselect Voltage):

¨C M48T128Y: VCC = 4.5 to 5.5V 4.1V ¡Ü VPFD ¡Ü 4.5V

¨C M48T128V*: VCC = 3.0 to 3.6V 2.7V ¡Ü VPFD ¡Ü 3.0V

¡ö CONVENTIONAL SRAM OPERATION; UNLIMITED WRITE CYCLES

¡ö SOFTWARE CONTROLLED CLOCK CALIBRATION FOR HIGH ACCURACY APPLICATIONS

¡ö 10 YEARS OF DATA RETENTION AND CLOCK OPERATION IN THE ABSENCE OF POWER

¡ö SELF-CONTAINED BATTERY AND CRYSTAL IN THE DIP PACKAGE

¡ö PIN AND FUNCTION COMPATIBLE WITH JEDEC STANDARD 128K x 8 SRAMs