- Integrated SRAM, real-time clock, crystal, power-fail control circuit, and battery
- Real-Time Clock counts seconds through years in BCD format
- RAM-like clock access
- Pin-compatible with industrystandard 512K x 8 SRAMs
- Unlimited write cycles
- 10-year minimum data retention and clock operation in the absence of power
- Automatic power-fail chip deselect and write-protection
- Software clock calibration for greater than ±1 minute per month accuracy
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