M41T93ZMY6F

Real Time Clock Overview

The M41T93ZMY6F is a low-power serial SPI bus real-time clock (RTC) manufactured by STMicroelectronics. It features an embedded 32.768 kHz crystal within the SOX18 package, eliminating the need for external oscillator components. The device provides non-volatile timekeeping with automatic leap year correction and includes seven bytes of user-accessible SRAM. A built-in power sense circuit ensures seamless switching to battery backup during main power failures. The component operates within a voltage range of 2.0 V to 5.5 V and supports industrial temperature ranges.

Real Time Clock Feature Summary

• Integrated SPI interface with automatic address incrementing
• Embedded 32.768 kHz crystal in SOX18 package
• Automatic calendar correction for months up to 31 days and leap years
• Built-in power failure detection and battery switchover

Real Time Clock Applications

• Smart grid distribution systems
• Smart metering applications
• Industrial equipment requiring precise timekeeping

Real Time Clock Procurement Notes

Verify the specific suffix ZMY6F against the manufacturer's official datasheet to confirm pinout compatibility and packaging details. Ensure that the embedded crystal configuration matches the design requirements, as this variant differs from QFN packages requiring external crystals. Confirm RoHS compliance status through current regulatory documentation before integration.

Real Time Clock Selection Notes

Select the M41T93ZMY6F when an SPI interface is preferred over I2C and board space savings are critical due to the integrated crystal. This model is suitable for designs requiring ultra-low battery current consumption of approximately 365 nA. Compare storage capacity needs, as this unit offers 7 bytes of SRAM alongside standard RTC registers.

Real Time Clock Part Context

This component belongs to the M41T93 series of real-time clocks. Unlike the M41T94 which offers larger memory capacities, the M41T93 focuses on compact integration with its embedded crystal option. It shares functional similarities with the M41T83 but utilizes a different serial bus protocol (SPI vs. I2C).

Real Time Clock Replacement Considerations

Direct substitutes include other M41T93 variants such as M41T93SQA6F, though package differences (QFN vs. SOX) must be evaluated. Cross-referencing with M41T83 models requires interface translation from SPI to I2C.