RX4901CE XS C03

Real Time Clock Overview

The RX4901CE XS C03 is a Real Time Clock (RTC) from the Epson RX4901CE series, manufactured by Epson Timing. It features a 3-wire or 4-wire SPI bus interface and utilizes high-stability crystal technology with a frequency stability of ±3.0 x 10^-6 over an operating temperature range of -40°C to +85°C. The device supports date formats including YY-MM-DD-dd and time formats in both 12-hour and 24-hour modes. It operates within a supply voltage range of 1.25 V to 5.5 V and is available in surface mount packages such as SOP-14 and VSOJ-12.

Real Time Clock Feature Summary

• High stability crystal oscillator with ±3.0 ppm accuracy (-40°C to +85°C)
• Supports 3-wire and 4-wire SPI bus interfaces
• Wide operating voltage range: 1.25 V to 5.5 V
• Integrated backup switching capability

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Data logging equipment
• Telecommunications infrastructure

Real Time Clock Procurement Notes

Verify the specific suffix 'C03' against official Epson documentation to confirm pinout and electrical characteristics, as suffixes often denote package type or tape/reel specifications. Check for availability restrictions or limited distribution status through authorized channels before procurement.

Real Time Clock Selection Notes

Select this component when high frequency stability (±3 ppm) is required across a wide industrial temperature range. Ensure the host system supports either 3-wire or 4-wire SPI protocols. Verify that the supply voltage aligns with the 1.25 V to 5.5 V operational window.

Real Time Clock Part Context

The RX4901CE series represents Epson's line of high-precision real-time clocks designed for applications demanding long-term accuracy. The 'XS' designation typically indicates the use of a high-stability crystal resonator, distinguishing it from standard variants within the same family.

Real Time Clock Replacement Considerations

Consult official cross-reference lists for direct substitutes. Generic RTCs may not match the ±3 ppm stability or specific SPI interface requirements. Verify pin compatibility if considering alternative packages like SOP-14.