RX8900CE:UA0

Real Time Clock Overview

The RX8900CE:UA0 is a Real Time Clock (RTC) IC from the Epson RX8900CE series, designed for high stability applications. It integrates a 32.768 kHz DTCXO (Digital Temperature Compensated Crystal Oscillator) to achieve a frequency tolerance of ±3.4 ppm across the operating temperature range. The device supports I2C bus communication and operates within a supply voltage range of 2.5 V to 5.5 V, with backup battery support from 1.6 V to 5.5 V. It features a 10-SMD, no-lead package measuring 3.2 x 2.5 mm and functions reliably between -40°C and +85°C.

Real Time Clock Feature Summary

• Integrated 32.768 kHz DTCXO providing ±3.4 ppm accuracy over -40°C to +85°C
• I2C bus interface supporting standard and fast mode operations
• Backup switching capability for seamless power transition
• Compact 10-SMD (3.2x2.5 mm) surface-mount package

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Consumer electronics with calendar and alarm functions
• Automotive infotainment and instrumentation modules
• IoT devices needing low-power real-time tracking

Real Time Clock Procurement Notes

Verify the specific suffix UA0 against the official Epson part number system to ensure correct packaging and temperature grade. Confirm RoHS3 compliance status for current production lots. Check lead times as manufacturing cycles may extend up to 30 weeks depending on regional availability and order volume.

Real Time Clock Selection Notes

Select this component when high frequency stability without external crystal trimming is required. Ensure the host microcontroller supports the I2C protocol and can handle the 10-SMD footprint. Verify that the system voltage remains within the 2.5 V to 5.5 V range during both main and backup power states.

Real Time Clock Part Context

This part belongs to the RX8900CE family, which includes variants like RX8900CE:UA3. The UA0 suffix typically denotes specific packaging or regional distribution parameters rather than functional differences, though users must consult the datasheet to confirm pinout and electrical characteristics match their design requirements.

Real Time Clock Replacement Considerations

Direct substitutes include other RX8900CE variants such as RX8900CE:UA3 if packaging compatibility allows. Cross-referencing with Epson's official substitution guide is recommended to verify thermal and electrical equivalence before integration.