RX8804CE XA0

Real Time Clock Overview

The RX8804CE XA0 is a real-time clock (RTC) module manufactured by Epson Timing, designed for industrial applications. It integrates a digital temperature-compensated crystal oscillator (DTCXO), a 32.768 kHz tuning fork crystal unit, and an RTC IC within a single ceramic package measuring 3.2 x 2.5 x 1.0 mm with 10 pins. The device operates on a voltage range of 1.6 V to 5.5 V and achieves a frequency tolerance of ±3.4 ppm across the -40°C to +85°C operating temperature range. It features I²C interface communication, programmable alarms, wake-up timers, and time stamp functions.

Real Time Clock Feature Summary

• Integrated DTCXO technology ensures high accuracy of ±3.4 ppm from -40°C to +85°C
• Ultra-low power consumption of 0.35 µA typical current in backup mode
• Compact 3.2 x 2.5 x 1.0 mm 10-pin ceramic surface-mount package
• Supports I²C interface with programmable interrupts, alarms, and time stamp capabilities

Real Time Clock Applications

• Industrial systems requiring precise timekeeping in wide temperature environments
• Smart grid equipment and pay-per-use systems
• Security systems and surveillance devices
• IoT modules and network equipment

Real Time Clock Procurement Notes

Verify the specific suffix 'XA0' against official Epson documentation to confirm packaging quantity and exact frequency tolerance specifications. The 'XA' suffix indicates ±3.4 ppm accuracy over -40°C to +85°C. Confirm availability status as supply levels may vary. Ensure compatibility with system voltage requirements of 1.6 V to 5.5 V before procurement.

Real Time Clock Selection Notes

Select the RX8804CE XA0 when high precision is required in industrial environments with temperatures up to 85°C. The DTCXO feature eliminates the need for external calibration components. Compare with the XB series if different temperature/accuracy trade-offs are needed. Ensure the PCB layout supports the small 3.2x2.5mm footprint and I²C bus requirements.

Real Time Clock Part Context

The RX8804CE belongs to Epson's RX series of general-purpose RTC modules, distinct from the RA series which is automotive-grade (AEC-Q100). The 'CE' suffix denotes the 3.2 x 2.5 mm ceramic package. This model succeeds earlier generations like the RX8900CE, offering reduced power consumption and expanded temperature ranges through integrated DTCXO technology.

Real Time Clock Replacement Considerations

Direct pin-to-pin replacements within the same family include other RX8804CE variants with different suffixes (e.g., XB3, XA3) which differ primarily in accuracy and packaging quantity. Cross-series replacement with RX8900CE requires verification of accuracy differences and power consumption changes.