M41T00SC64MY6F

Real Time Clock Overview

The M41T00SC64MY6F is a low-power serial real-time clock (RTC) manufactured by STMicroelectronics. It features an integrated 32.768 kHz oscillator controlled by an external crystal and utilizes binary-coded decimal (BCD) format for timekeeping registers. The device provides eight bytes of SRAM for calendar and clock functions, including automatic leap year compensation valid until 2100. Data transfer occurs via a bidirectional I²C interface supporting the 400 kHz protocol. It operates within a voltage range of 2.0 V to 5.5 V and includes a power-fail detection circuit for automatic switchover to backup power sources.

Real Time Clock Feature Summary

• Integrated 32.768 kHz oscillator with external crystal
• Automatic switchover from main supply to battery backup upon power failure
• I²C serial interface compatible with 400 kHz fast mode protocol
• Eight-byte BCD register set for seconds, minutes, hours, day, date, month, year, and century

Real Time Clock Applications

• Data logging systems requiring precise timestamping
• Portable electronic devices with battery backup requirements
• Industrial control systems needing calendar functionality
• Consumer electronics utilizing I²C communication buses

Real Time Clock Procurement Notes

Verify the specific suffix codes against official STMicroelectronics documentation to confirm package type and temperature range. Ensure compatibility with system voltage levels between 2.0 V and 5.5 V. Confirm that the I²C bus speed supports up to 400 kHz. Check for required external components such as the 32.768 kHz crystal and backup battery connections.

Real Time Clock Selection Notes

Select this component when a low-power RTC with automatic switchover is required. It is suitable for applications needing calendar functions with leap year correction. Consider the operating temperature range of -40°C to +85°C for industrial environments. Verify that the I²C address and protocol match the host controller capabilities.

Real Time Clock Part Context

This part belongs to the M41T00M series of serial real-time clocks from STMicroelectronics. The series is designed for low-power applications requiring accurate timekeeping with minimal external components. The M41T00 variant specifically offers basic RTC functions with I²C interface and battery backup support.

Real Time Clock Replacement Considerations

Direct replacements include other parts within the M41T00 family, such as the M41T00S or M41T00AUD, depending on additional feature requirements like audio output. Verify pinout and register compatibility before substitution.