M41T56C64 Datasheet, PDF (1/19 Pages) STMicroelectronics – Serial Real Time Clock with 56 bytes of NVRAM+64 Kbit (8192 bit x 8) EEPROM

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)
■ RoHS compliant
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 100kHz
protocol
Serial EEPROM features
■ 8192 bytes of general purpose EEPROM
(more than 1e6 erase/write cycles)
■ Two-wire I²C serial interface supports 400kHz
protocol
■ Byte and page write (up to 32 bytes)
■ More than 40 year data retention
■ Self-timed programming cycle
Embedded crystal
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SOX18(MY)
18-pin (300mil) SOIC
September 2006
Rev 4
1/19
www.st.com
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