M41T62Q6F

Real Time Clock Overview

The M41T62Q6F is a low-power serial real-time clock (RTC) manufactured by STMicroelectronics. It features a built-in 32.768 kHz oscillator and communicates via a two-line bidirectional I²C interface. The device includes registers for clock/calendar functions in BCD format, along with alarm, calibration, and watchdog controls. It operates within a voltage range of 1.3 V to 4.4 V and supports timekeeping down to 1.0 V. The component is housed in a 16-pin QFN package measuring 3 x 3 x 0.88 mm, suitable for surface mount installation.

Real Time Clock Feature Summary

• Low power consumption with 350 nA timekeeping current at 3 V
• Built-in 32.768 kHz oscillator requiring external crystal
• I²C serial interface supporting up to 400 kHz speed
• Automatic correction for month lengths including leap years

Real Time Clock Applications

• Portable consumer electronics requiring precise timekeeping
• Battery-powered devices utilizing lithium-ion backup
• Systems needing programmable alarm or watchdog interrupts

Real Time Clock Procurement Notes

Verify the specific suffix Q6F against official datasheets to confirm package type and temperature grade. Ensure compatibility with the host system's I²C voltage levels, as the operating range extends from 1.3 V to 4.4 V. Confirm availability status directly with authorized distributors, as supply chain conditions may vary.

Real Time Clock Selection Notes

Select this model when a small form factor QFN package is required alongside an integrated oscillator. Compare against the M41T6x family variants to determine if additional features like programmable square wave outputs or embedded crystals are necessary. Ensure the application environment stays within the -40 °C to +85 °C operating temperature range.

Real Time Clock Part Context

The M41T62Q6F belongs to the M41T6x series of low-power serial RTCs. This family distinguishes itself by offering a tiny 3 x 3 mm QFN package that requires a user-supplied crystal, contrasting with LCC variants that include embedded crystals. It provides essential timekeeping with minimal external component count.

Real Time Clock Replacement Considerations

Direct replacements within the same series include M41T62, M41T64, and M41T65, depending on required output features such as square wave generation or watchdog timers. Verify pinout and register compatibility before substitution.