M48T18 sram equivalent, 64 kbit 8kb x 8 timekeeper sram.
* Integrated ultra low power SRAM, real-time clock, power-fail control circuit, and battery
* BYTEWIDE™ RAM-like clock access
* BCD coded year, month, day, da.
* Self-contained battery and crystal in the CAPHAT™ DIP package
* Packaging includes a 28-lead SOIC and SNAPHAT®.
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