RX8900CE:UB0

Real Time Clock Overview

The RX8900CE:UB0 is a Real-Time Clock (RTC) module manufactured by Epson Timing. It integrates an I2C bus interface, backup switching, and a digital temperature compensated crystal oscillator (DTCXO). The device operates within a supply voltage range of 2.5 V to 5.5 V and supports a working temperature range of -40°C to +85°C. It provides timekeeping in HH:MM:SS (24-hour) format and date tracking in YY-MM-DD-dd format. The component is designed for surface mount installation and is supplied in tape and reel packaging.

Real Time Clock Feature Summary

• Integrated DTCXO technology providing ±5.0 ppm frequency accuracy over the -40°C to +85°C operating range
• I2C bus interface for system communication
• Built-in backup switching mechanism for continuous operation during power loss
• Compact SMD/SMT package suitable for space-constrained designs

Real Time Clock Applications

• Portable electronic devices requiring low power consumption
• Automotive electronics systems
• Outdoor equipment exposed to varying environmental temperatures
• Solar energy storage systems

Real Time Clock Procurement Notes

Verify the specific suffix UB0 against official Epson documentation to confirm the ±5.0 ppm accuracy specification and temperature range. Confirm that the required packaging format matches the available reel or cut tape options. Ensure compatibility with the target I2C bus voltage levels before integration.

Real Time Clock Selection Notes

Select this model when high precision is required across wide industrial temperature ranges without external crystals. The integrated DTCXO eliminates the need for separate temperature compensation circuits. Compare against UC suffix variants if the application operates strictly within -30°C to +70°C, as different accuracy profiles may apply.

Real Time Clock Part Context

This component belongs to the RX8900CE series of high-precision clock modules. The series utilizes CMOS processes to achieve low current consumption while maintaining high stability. The :UB0 designation specifically denotes the accuracy grade and operational temperature limits defined by Epson Timing for this product line.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided data. Verify pinout and register compatibility if considering alternative RTC modules from other manufacturers.