M41T66Q6F

Real Time Clock Overview

The M41T66Q6F is a serial access real-time clock/calendar integrated circuit manufactured by STMicroelectronics. It operates within a supply voltage range of 1.5 V to 4.4 V and utilizes an I2C, 2-Wire Serial interface for communication. The device is housed in a 16-QFN (3x3) package and includes hardware features such as alarms and leap year compensation. It supports standard time formats including HH:MM:SS and date formats D:M:Y:C, ensuring accurate timekeeping for embedded applications requiring precise calendar functions.

Real Time Clock Feature Summary

• Serial access real-time clock with alarm functionality
• Hardware leap year compensation
• I2C, 2-Wire Serial interface

Real Time Clock Applications

• Embedded systems requiring accurate timekeeping
• Data logging devices
• Consumer electronics with calendar functions

Real Time Clock Procurement Notes

Verify the specific ordering suffix and package variant against official STMicroelectronics documentation before procurement. Confirm that the requested component matches the exact electrical specifications and pinout configuration required for your design. Ensure compatibility with the target system's voltage levels and interface protocols. Cross-reference the manufacturer part number with authorized distributors to guarantee authenticity and traceability.

Real Time Clock Selection Notes

Select this component when a low-voltage serial RTC with alarm capabilities is required. The 16-QFN package suits space-constrained designs. Verify that the I2C interface aligns with the host microcontroller's available ports. Consider the operating temperature range and supply voltage requirements relative to the application environment. Ensure the hardware leap year feature meets the long-term accuracy needs without software intervention.

Real Time Clock Part Context

The M41T66Q6F belongs to the M41T66 series of real-time clocks from STMicroelectronics. This series provides serial access RTC solutions with additional features like alarms. The QFN package offers a compact footprint suitable for modern electronic devices. It complements other timing components by providing dedicated calendar and timekeeping functions via a simple two-wire interface.

Real Time Clock Replacement Considerations

Check for direct substitutes within the M41T66 series or compatible RTC ICs with identical pinouts and interfaces. Verify that any replacement maintains the same voltage range and package dimensions. Ensure functional equivalence regarding alarm capabilities and leap year compensation. Consult official substitution guides for confirmed alternatives.