M41T00 is a low power serial real-time clock with a built-in 32.768 kHz oscillator. It features counters for seconds, minutes, hours, day, month, years, and century, supports I2C bus (100 kHz protocol), operates at a clock voltage of 2.0 to 5.5 V, has an ultra low battery supply current of 0.8 µA, and includes automatic switchover and deselect circuitry, software clock calibration, and automatic leap year compensation.
The document describes the M41T00, a low-power serial real-time clock with an integrated 32.768 kHz crystal oscillator. It utilizes an 8-byte RAM configured in Binary Coded Decimal (BCD) format for timekeeping and includes automatic power failure detection to switch between Vcc and battery supply.
| Oscillator Frequency | 32.768 kHz |
|---|---|
| Supply Voltage Range | 2.0 to 5.5 V |
| Battery Supply Current | 0.8 uA (typ) |
| Operating Temperature Range | -40 to 85 °C |
| Package Type | 8-lead plastic small outline |
No, it is not recommended for new designs; users should use the M41T00S instead.
The typical data retention time is in excess of 5 years with a specific lithium cell.