M41T62LC6F

Real Time Clock Overview

The M41T62LC6F is a low-power serial real-time clock (RTC) from STMicroelectronics, part of the M41T6x family. It features a built-in 32.768 kHz oscillator with integrated load capacitors, eliminating the need for external crystals. The device utilizes a 400 kHz I²C interface and operates within a voltage range of 1.3 V to 4.4 V. Key specifications include a timekeeping current of 350 nA at 3 V and operation down to 1.0 V. It provides calendar functions with automatic leap-year correction, programmable alarms, and user RAM.

Real Time Clock Feature Summary

• Built-in 32.768 kHz crystal oscillator with integrated load capacitors
• 400 kHz I²C serial interface with memory-mapped registers
• Low power consumption: 350 nA timekeeping current at 3 V
• Automatic calendar corrections for 28, 29, 30, and 31-day months

Real Time Clock Applications

• Battery-powered portable devices requiring precise timekeeping
• Systems utilizing lithium-ion batteries for main power supply
• Microcontroller-based systems needing alarm interrupts or watchdog timers

Real Time Clock Procurement Notes

Verify the specific suffix 'LC6F' against official STMicroelectronics documentation to confirm package type and tape/reel configuration. Ensure compatibility with system voltage levels, noting the 1.3 V minimum operating voltage. Confirm that the embedded crystal variant meets the required frequency stability for the application environment.

Real Time Clock Selection Notes

Select this component when an embedded crystal solution is preferred to reduce board space and assembly complexity. The M41T62LC6F is suitable for applications requiring low standby current and I²C connectivity. Compare with the standard QFN version if an external crystal is already present in the design or if different pinout requirements exist.

Real Time Clock Part Context

The M41T62LC6F belongs to the M41T6x series of low-power RTCs. This series distinguishes itself by offering both QFN packages requiring external crystals and LCC packages with embedded crystals. The LC6F designation typically indicates the embedded crystal LCC package variant, providing a compact 1.5 x 3.2 mm footprint.

Real Time Clock Replacement Considerations

Direct replacements within the same family include other M41T6x variants such as M41T62, M41T64, or M41T65, depending on specific feature needs like square wave outputs or additional alarms. Verify pin compatibility and register map consistency before substitution.