M41T66 is a serial real-time clock with alarm function. It has counters for various time units, supports I2C bus, and is suitable for lithium-ion rechargeable devices.
The M41T66 is a low-power serial real-time clock (RTC) featuring a built-in 32.768 kHz oscillator and an I2C interface. It includes counters for tenths/hundredths of seconds through the century, as well as programmable alarms and a watchdog timer. The device supports software clock calibration to compensate for crystal deviation and automatic leap year compensation.
| Timekeeping current | 525 nA |
|---|---|
| Low operating current | 35 uA |
| Operating temperature | -40 to 85 C |
| Package type | 16-pin QFN |
| Oscillator frequency | 32.768 kHz |
Yes, it includes automatic leap year compensation.
The timekeeping current is 525 nA at 3 V.