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com M41T56C64 Serial Real Time Clock with 56 bytes of NVRAM + 64 Kbit (8192 bit x 8) EEPROM Feature summary ■ ■ ■ ■ 5V ±10% supply voltage I2C bus compatible Operating temperature of –40 to 85°C Packaging includes: – 18-lead SOIC (with embedded crystal) 18 Embedded crystal ■ RoHS compliant 1 Serial RTC features ■ Counters for seconds, minutes, hours, day, date, month, years, and century Embedded crystal package Software clock calibration Automatic power-fail detect and switch circuitry 56 bytes of general purpose SRAM Ultra-low battery supply current of 450nA Automatic leap year compensation Special software programmable output Two-wire I2C serial interface supports 10...

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