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M41T81M6E Datasheet(PDF) 1 Page - STMicroelectronics |
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M41T81M6E Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 30 page Not For New Design This is information on a product still in production but not recommended for new designs. May 2008 Rev 9 1/30 1 M41T81 Serial access real-time clock with alarm Features ■ For new designs use M41T81S ■ Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century ■ 32 KHz crystal oscillator integrating load capacitance (12.5 pF) providing exceptional oscillator stability and high crystal series resistance operation ■ Serial interface supports I2C bus (400 kHz protocol) ■ Ultra-low battery supply current of 0.6 µA (typ at 3 V) ■ 2.0 to 5.5 V clock operating voltage ■ Automatic switch-over and deselect circuitry (for 3V application select M41T81S datasheet) ■ Power-down time stamp (HT bit) allowing determination of time elapsed in battery backup ■ Programmable alarm and interrupt function (valid even during battery backup mode) ■ Accurate programmable watchdog timer (from 62.5 ms to 128 s) ■ Software clock calibration to compensate crystal deviation due to temperature ■ Operating temperature of –40 to 85°C ■ ECOPACK® package available 8 1 SO8 (M) 8-pin SOIC www.st.com |
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