RA8900CE UB3

Real Time Clock Overview

The RA8900CE UB3 is a Real-Time Clock (RTC) module manufactured by Epson Timing. It operates on a Serial 2-Wire I2C bus interface and supports a date format of YY-MM-DD-dd alongside a 24-hour HH:MM:SS time format. The device functions within a supply voltage range of 2.5 V to 5.5 V and is rated for an operating temperature range of -40°C to +85°C. Key technical specifications include a 32.768kHz oscillator with +/-5ppm accuracy and integrated backup switching capabilities. The component is designed for surface mount installation.

Real Time Clock Feature Summary

• I2C serial bus interface for digital communication
• Backup switching mechanism for continuous operation
• -40°C to +85°C industrial temperature rating
• 2.5V to 5.5V wide supply voltage range

Real Time Clock Applications

• Qualcomm SA8295P automotive platform integration
• Qualcomm SA8155P automotive platform integration

Real Time Clock Procurement Notes

Verify the specific suffix 'UB3' against official Epson documentation to confirm pinout and electrical characteristics, as suffixes often denote package or tape-and-reel variations. Confirm RoHS compliance status through the manufacturer's current datasheet before finalizing procurement specifications.

Real Time Clock Selection Notes

Select this component when an I2C-connected RTC is required for automotive-grade environments. Ensure the system design accommodates the 2.5V to 5.5V input range and that the PCB layout supports the specified surface mount package type. Verify compatibility with the target microcontroller's I2C voltage levels.

Real Time Clock Part Context

This part belongs to the RX8900CE/RX8900 series of real-time clock modules from Epson Timing. These components are widely utilized in embedded systems requiring precise timekeeping. The RA8900CE variant specifically targets automotive applications, aligning with the qualification standards for vehicle electronics platforms.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Epson Timing for direct cross-reference recommendations based on specific package and performance requirements.