RX4901CE XS B0B

Real Time Clock Overview

The RX4901CE XS B0B is a Real-Time Clock (RTC) module 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 over the temperature range of -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 in HH:MM:SS (24 hr). The device includes 256 bytes of storage capacity and utilizes backup switching for power continuity.

Real Time Clock Feature Summary

• High stability accuracy of ±3.0 ppm (-40 °C to +85 °C)
• 3-wire SPI bus interface
• Operating voltage range of 1.6 V to 5.5 V
• 256-byte storage capacity

Real Time Clock Applications

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

Real Time Clock Procurement Notes

Verify the specific suffix 'B0B' against official Epson documentation to confirm pinout and electrical characteristics, as suffixes often denote packaging or specific variant details. Ensure compatibility with the host system's SPI protocol configuration. Check for restricted supply status through authorized distributors.

Real Time Clock Selection Notes

Select this component when a 3-wire SPI interface is preferred over I2C. The ±3.0 ppm stability is suitable for applications demanding higher precision than standard crystal oscillators. Verify that the operating environment remains within the -40 °C to +85 °C range to maintain specified accuracy.

Real Time Clock Part Context

This part belongs to the RX4901CE series of real-time clock modules from Epson Timing. The series offers various interface options and stability grades. The 'XS' designation typically indicates the high-stability grade, while the suffix defines the specific package and tape/reel configuration for surface mount assembly.

Real Time Clock Replacement Considerations

Direct replacements must match the 3-wire SPI interface and physical footprint. Cross-model comparisons should consider the RX8901CE series, though it primarily utilizes I2C interfaces. Verify pin compatibility and register mapping before substitution.