M41T93RMY6E

Real Time Clock Overview

The M41T93RMY6E is a low-power serial SPI bus real-time clock (RTC) manufactured by STMicroelectronics. It features an embedded 32.768 kHz crystal oscillator within its SOX18 package, eliminating the need for external timing components. The device provides non-volatile timekeeping with automatic leap year correction and includes 7 bytes of user-accessible SRAM. Key specifications include a supply voltage range of 2.0 V to 5.5 V, ultra-low battery current consumption of 365 nA, and factory-calibrated accuracy of ±5 ppm typical after two reflow cycles. It supports automatic power failure detection and switching to backup battery supply.

Real Time Clock Feature Summary

• Integrated SPI interface with automatic address increment
• Embedded 32.768 kHz crystal in SOX18 package
• Automatic power fail detection and battery switchover
• Factory calibrated accuracy of ±5 ppm typical

Real Time Clock Applications

• Industrial equipment requiring precise timekeeping
• Consumer electronics with battery backup needs
• Data logging systems requiring RTC functionality

Real Time Clock Procurement Notes

Verify the specific suffix 'RMY6E' against official STMicroelectronics documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing PCB footprint designs for the SOX18 package. Confirm RoHS compliance status through the manufacturer's declaration before procurement.

Real Time Clock Selection Notes

Select this component when an integrated crystal solution is preferred over external oscillators to save board space. The SPI interface requires four wires, which may impact pin count compared to I2C alternatives. Consider the ±5 ppm accuracy sufficient for most general applications, or utilize the calibration registers for higher precision requirements.

Real Time Clock Part Context

This part belongs to the M41T93 series of real-time clocks from STMicroelectronics. The series is designed for low-power applications requiring reliable timekeeping with minimal external components. The M41T93 variant specifically integrates the crystal, distinguishing it from versions like the M41T93Q that require external crystals.

Real Time Clock Replacement Considerations

Direct replacements include other M41T93 variants such as M41T93ZMY6E, provided the package and interface specifications match. Verify pinout compatibility and register map alignment before substituting.