M48T128V sram equivalent, 1 mbit (128 kb x 8) timekeeper sram.
SUMMARY
* INTEGRATED, ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT, BATTERY, AND CRYSTAL
* BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES, .
* 10 YEARS OF DATA RETENTION AND CLOCK OPERATION IN THE ABSENCE OF POWER
* SELF-CONTAINED BATTERY AND CRYSTAL IN.
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