RX4901CE XS B00

Real Time Clock Overview

The RX4901CE XS B00 is a Real-Time Clock (RTC) IC manufactured by Epson Timing. It features a 3-wire SPI bus interface and operates within a supply voltage range of 1.6 V to 5.5 V. The component provides high stability with an accuracy of ±3.0 x 10^-6 from -40°C to +85°C, corresponding to a monthly rate of ±8 seconds. It supports date formats including YY-MM-DD-dd and time formats HH:MM:SS in 24-hour mode. The device is housed in a 10-SMD, no-lead package measuring 3.2 mm x 2.5 mm with a maximum thickness of 1.0 mm.

Real Time Clock Feature Summary

• High stability quartz crystal oscillator with ±3.0 ppm accuracy (-40°C to +85°C)
• 3-wire SPI bus interface for data communication
• Low current consumption of 1.5 µA at 3V
• Integrated calendar function supporting leap year compensation

Real Time Clock Applications

• Portable electronic devices requiring precise timekeeping
• Industrial control systems operating in wide temperature ranges
• Data logging equipment needing accurate timestamping

Real Time Clock Procurement Notes

Verify the specific suffix 'XS B00' against official Epson documentation to confirm interface type and packaging details. Ensure compatibility with the host system's SPI protocol and voltage levels before integration. Check for restricted availability status as indicated by distributor listings.

Real Time Clock Selection Notes

Select this model when high frequency stability is critical over a wide industrial temperature range. Compare against the XB variant if ±5 ppm accuracy is sufficient for the application. Confirm that the 3-wire SPI interface aligns with the microcontroller's available peripherals.

Real Time Clock Part Context

This part belongs to the RX4901CE series of real-time clocks from Epson Timing. The series includes variants with different interfaces such as I2C and 4-wire SPI. The 'XS' designation typically indicates the higher stability grade compared to standard versions.

Real Time Clock Replacement Considerations

Direct substitutes include other RX4901CE variants with compatible pinouts and electrical characteristics. Verify interface compatibility (3-wire SPI vs. I2C or 4-wire SPI) when considering alternative models within the same family.