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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

¡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 M48T512Y: VCC = 4.5 to 5.5V

4.2V ¡Ü VPFD ¡Ü 4.5V

¨C M48T512V*: 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 PIN AND FUNCTION COMPATIBLE WITH

INDUSTRY STANDARD 512K x 8 SRAMS

¡ö SELF-CONTAINED BATTERY AND

CRYSTAL IN DIP PACKAGE