RX4901CE XS C0B

Real Time Clock Overview

The RX4901CE XS C0B is a Real-Time Clock (RTC) IC manufactured by Epson Timing. It features a 3-wire or 4-wire SPI bus interface and supports date formats including YY-MM-DD-dd and time formats such as HH:MM:SS with 12-hour or 24-hour options. The device offers high stability with an accuracy of ±3.0 x 10^-6 over the operating temperature range of -40°C to +85°C, corresponding to a monthly rate of ±8 seconds. It operates within a supply voltage range of 1.6V to 5.5V and is housed in a compact surface-mount package.

Real Time Clock Feature Summary

• High stability accuracy of ±3.0 x 10^-6 (-40°C to +85°C)
• Supports 3-wire and 4-wire SPI bus interfaces
• Wide operating voltage range from 1.6V to 5.5V
• Compact SMD package suitable for space-constrained designs

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Automotive electronics operating in wide temperature ranges
• Portable devices needing low-power real-time clock functionality

Real Time Clock Procurement Notes

Verify the specific suffix 'C0B' against official Epson documentation to confirm pinout and feature variations compared to other variants like 'XS C00'. Check availability through authorized distributors as stock levels may vary. Ensure compliance with RoHS and REACH regulations if required for your region.

Real Time Clock Selection Notes

Select this component when high frequency stability is critical in environments with significant temperature fluctuations. The SPI interface choice depends on the host microcontroller's available peripherals. Confirm that the operating voltage range aligns with the system power supply rails.

Real Time Clock Part Context

This part belongs to the RX4901CE series of real-time clocks from Epson Timing. It shares core architectural similarities with models like the RX8901CE but differs in interface support and stability specifications. The series is designed for applications demanding reliable timekeeping in harsh conditions.

Real Time Clock Replacement Considerations

Direct substitutes should be sought within the Epson RX4901CE family with matching stability grades. Cross-referencing with the RX8901CE may be possible if I2C compatibility is not required and SPI interface can be adapted.