STMicroelectronics M41T11MH6F Serial RTC

The M41T11MH6F from STMicroelectronics is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator (external crystal controlled) and an integrated battery-backup switch. This high-quality RTC module provides a full binary-coded decimal (BCD) clock/calendar that is accessible via a simple serial interface. The clock/calendar functionality includes seconds, minutes, hours, day, date, month, and year information, with automatic adjustments for months with fewer than 31 days, including corrections for leap years.

The M41T11MH6F also features a programmable alarm and interrupt function that extends its capability for time-related event management. An additional 56 bytes of NV RAM are provided, allowing the user to store additional information or system status reports that need to be preserved in the event of a power loss. This non-volatile RAM makes the M41T11MH6F particularly suitable for systems that require data to be readily available upon power-up.

Operating within a voltage range of 2.7V to 5.5V, this RTC is designed for high reliability and low-power consumption, making it ideal for battery-powered applications. The device is housed in an 8-pin SOIC package, ensuring ease of integration into various designs, particularly where space is at a premium.

Key features of the M41T11MH6F include:

• Counters for seconds, minutes, hours, day, date, month, and years
• Automatic end-of-month date correction
• Programmable alarm and interrupt function
• 56 bytes of battery-backed non-volatile (NV) RAM
• Low power consumption
• Serial I²C interface

STMicroelectronics' M41T11MH6F is a versatile and reliable choice for applications requiring accurate timekeeping, such as embedded systems, utility meters, POS terminals, and many other electronic devices. Its integration of both timekeeping and non-volatile storage functions in a compact package makes it a comprehensive solution for maintaining accurate time and system state across power cycles.