RTC with I²C bus and on-chip timers
The M41T81M6F is an I²C-compatible real-time clock from STMicroelectronics, providing timekeeping in HH:MM:SS:hh (24-hour) and calendar in YY-MM-DD-dd format. Packaged in a standard 8-pin SOIC (3.90 mm body width) for surface-mount assembly, it integrates an alarm, a watchdog timer, and a programmable square-wave output — functions that offload periodic housekeeping from the host MCU. Supply voltage spans 2 V to 5.5 V, with a separate battery-backup input requiring 2.5 V to 3.5 V. The timekeeping current draw is 100 µA maximum across the full supply range, making it suitable for battery-powered or always-on systems where the RTC must remain alive during a main power loss.
Active production, ROHS3, and industrial temp range
The part is sourced through independent distribution channels; availability and current pricing are confirmed at RFQ against the BOM quantity.