RX8900CE:UAB

Real Time Clock Overview

The RX8900CE:UAB is a Real Time Clock (RTC) IC manufactured by Epson Timing, belonging to the RX8900CE series. It features an I2C-BUS interface and maintains time in HH:MM:SS (24-hour) format with YY-MM-DD-dd date tracking. The device operates within a supply voltage range of 2.5 V to 5.5 V and supports a backup switching function for continuous operation during power loss. It is designed for surface mount installation and functions reliably across an extended temperature range from -40°C to +85°C. The component utilizes a DTCXO (Digital Temperature Compensated Crystal Oscillator) technology with a frequency of 32.768 kHz, ensuring high accuracy.

Real Time Clock Feature Summary

• I2C-BUS serial interface for communication
• DTCXO technology providing +/-3.4 PPM accuracy
• Backup switching capability for uninterrupted timekeeping
• Operating temperature range of -40°C to +85°C

Real Time Clock Applications

• Industrial control systems requiring precise time synchronization
• Automotive electronics operating in extreme temperatures
• Data logging devices needing reliable calendar and clock functions

Real Time Clock Procurement Notes

Verify the specific suffix UAB against official Epson documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status through the manufacturer's product compliance database before procurement. Check current production lifecycle status as delivery times may vary significantly based on manufacturing schedules.

Real Time Clock Selection Notes

Select this model when high precision timing is required without external crystal components. The I2C interface compatibility should be verified against the host microcontroller. Ensure the 2.5V to 5.5V supply voltage range matches the system design. Consider the -40°C to +85°C operating range for environmental suitability.

Real Time Clock Part Context

This component is part of the Epson RX8900 family of real-time clocks. The CE variant specifically denotes the package and feature set associated with this model line. It serves as a standalone timing solution integrating oscillator and calibration logic.

Real Time Clock Replacement Considerations

Direct substitutes within the same family include RX8900CE:UB6, which shares similar electrical characteristics but differs in packaging configuration. Verify pinout compatibility and software register mapping before substituting.