M41T00CAPPC1

Real Time Clock Overview

The M41T00CAPPC1 is a low-power serial real-time clock (RTC) from STMicroelectronics, housed in a 24-pin CAPHAT package. It integrates a lithium coin cell battery and a 32.768 kHz crystal oscillator within the component body. The device features an industry-standard two-line, 400 kHz bidirectional I²C interface for data transfer. It includes eight registers configured in binary-coded decimal (BCD) format to track seconds, minutes, hours, day, date, month, year, and century. An internal power sense circuit automatically switches to the backup battery upon detecting a power failure, ensuring continuous timekeeping.

Real Time Clock Feature Summary

• Integrated backup battery and 32.768 kHz crystal in a 24-pin CAPHAT™ package
• 400 kHz I²C serial interface with automatic address register increment
• Automatic switchover to backup battery via built-in power fail detection circuit
• Software clock calibration and oscillator stop detection capabilities

Real Time Clock Applications

• Real-time monitoring systems requiring precise timekeeping
• Industrial equipment needing reliable calendar functions
• Embedded controllers utilizing I²C communication protocols

Real Time Clock Procurement Notes

Verify the specific suffix 'PPC1' against official STMicroelectronics documentation to confirm exact pinout and electrical characteristics. Confirm RoHS compliance status and lead-free interconnect specifications as stated in general product descriptions. Ensure the source document explicitly lists this full part number to avoid substitution errors with similar M41T00 variants.

Real Time Clock Selection Notes

Select this component when a self-contained RTC solution is required to minimize PCB space. The integrated battery eliminates external component placement for backup power. Verify that the system operates within the 2.7 V to 5.5 V voltage range and supports the 400 kHz I²C speed. Check if the 0 to 70 °C operating temperature range meets the application's environmental requirements.

Real Time Clock Part Context

This part belongs to the M41T00 series of serial real-time clocks. It shares core functionality with other members like the M41T00S but differs in packaging and integration level. The CAPHAT package distinguishes it by housing the battery and crystal internally, offering a compact alternative to standard DIP or SOIC packages with external components.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided reference material. Consult STMicroelectronics for direct replacements or verify compatibility with generic I²C RTCs if pinouts differ.