RX8900CEUC3

Real Time Clock Overview

The RX8900CE:UB3 is a Real Time Clock (RTC) IC manufactured by Epson Timing. It features a Serial 2-Wire I2C bus interface and supports date formats of YY-MM-DD-dd and time formats of HH:MM:SS in 24-hour mode. The device operates within a supply voltage range of 2.5 V to 5.5 V and includes backup switching capabilities. It is designed for surface mount installation in SMD/SMT packages, such as Reel, Cut Tape, or MouseReel configurations. The component functions reliably across an operating temperature range from -40°C to +85°C.

Real Time Clock Feature Summary

• I2C Bus Interface: Utilizes a Serial 2-Wire I2C communication protocol for data exchange.
• Backup Switching: Integrated circuitry for seamless power source transition between main supply and backup battery.
• Wide Operating Voltage: Supports supply voltages from 2.5 V up to 5.5 V.
• Industrial Temperature Range: Certified for operation between -40°C and +85°C.

Real Time Clock Applications

• Data logging systems requiring precise timestamping
• Embedded controllers needing calendar and timekeeping functions
• Industrial equipment operating in extreme temperatures

Real Time Clock Procurement Notes

Verify the specific suffix (e.g., :UB3) against official Epson documentation to confirm package type and tape/reel specifications. Ensure compatibility with the target I2C bus voltage levels before integration. Check RoHS compliance status via the manufacturer's datasheet for regulatory adherence.

Real Time Clock Selection Notes

Select this model when an I2C-connected RTC with backup switching is required. Confirm that the 14-SOP or equivalent package fits the PCB layout. Verify that the 2.5V-5.5V supply range matches the system design. Consider the -40°C to +85°C temperature rating for environmental suitability.

Real Time Clock Part Context

This component belongs to the RX8900CE series of real-time clocks. It shares functional similarities with other variants like the RX8900SA:UC3 but differs in package and specific electrical characteristics. The part number alias X1B000301000212 may be used in internal ordering systems.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Epson Timing directly for qualified replacements or cross-reference with the RX8900SA series if pinout and interface compatibility allow.