RX8901CE XS A03

Real Time Clock Overview

The RX8901CE XS A03 is a Real-Time Clock (RTC) IC manufactured by Epson Timing, belonging to the RX8901CE series. It features an I2C bus interface and operates within a supply voltage range of 1.6V to 5.5V. The device provides clock/calendar functions with a date format of YY-MM-DD and time format of HH:MM:SS. It supports a backup switching mechanism and includes alarm features. The component is housed in a 10-SMD, no-lead package with dimensions of 3.2 x 2.5 mm. It is designed for surface mount installation and operates across a temperature range of -40°C to +105°C.

Real Time Clock Feature Summary

• I2C Bus Interface for serial communication
• High stability crystal oscillator with ±3.0ppm accuracy at -40°C to 85°C
• Low power consumption with 1.5µA current draw at 3V
• Built-in backup switching capability

Real Time Clock Applications

• Data logging systems requiring precise timestamping
• Portable electronic devices needing low-power timekeeping
• Industrial equipment operating in extended temperature environments

Real Time Clock Procurement Notes

Verify the specific suffix 'A03' against official Epson documentation, as standard listings often reference 'A00' or 'A0B'. Confirm availability through authorized distributors like Mouser or Digi-Key, noting that some variants may have restricted regional sales or limited stock. Ensure the ordering suffix corresponds to the required packaging type, such as tape and reel or bulk.

Real Time Clock Selection Notes

Select this model when high frequency accuracy (±3ppm) is critical for the application's timing requirements. The wide operating temperature range (-40°C to +105°C) makes it suitable for industrial applications. Ensure the system design accommodates the 1.6V to 5.5V supply voltage range and includes a bypass capacitor near the Vcc-GND pins for stable operation.

Real Time Clock Part Context

The RX8901CE is part of Epson's high-precision RTC family, offering alternatives to other models like the RX8900CE. The 'XS' designation indicates a tighter frequency tolerance of ±3.0ppm compared to the 'XB' variant. The pin configuration includes Pin 4 for FOUT output in the 'A0' sub-series, while 'B0' variants assign EVIN3 to this pin.

Real Time Clock Replacement Considerations

Direct substitutes include other RX8901CE variants with different suffixes (e.g., RX8901CE XS A00, RX8901CE XB A06) depending on packaging and specific pin function requirements. Cross-model replacements within the RX8900 series may require verification of pin compatibility and feature sets.