RX4901CE XB D00

Real Time Clock Overview

The RX4901CE XB D00 is a Real-Time Clock (RTC) IC manufactured by Epson Timing. It features an integrated frequency-adjusted 32.768 kHz crystal unit and DTcxo technology for high stability. The device supports 3-wire and 4-wire SPI bus interfaces. It operates within a supply voltage range of 1.6 V to 5.5 V and maintains a typical current consumption of 240 nA at 3 V. The component provides auto power switching between main and backup supplies, timestamping capabilities, and multiple interrupt outputs including alarm and wake-up functions.

Real Time Clock Feature Summary

• Integrated 32.768 kHz crystal unit with DTcxo for enhanced frequency stability
• Supports both 3-wire and 4-wire SPI serial bus interfaces
• Auto power switching function monitors VDD/VBAT to switch to backup supply
• Includes time stamp function supporting up to 32 timestamps

Real Time Clock Applications

• General purpose real-time clocking in embedded systems
• Data logging applications requiring timestamp functionality
• Battery-backed systems utilizing automatic power switching

Real Time Clock Procurement Notes

Verify the specific suffix 'D00' against official Epson documentation to confirm temperature grade and packaging details. Ensure compatibility with existing SPI controller configurations regarding pin definitions and protocol timing. Cross-reference the manufacturer part number with authorized distributors to confirm availability status and lead times.

Real Time Clock Selection Notes

Select this component when SPI interface is preferred over I2C. The XB suffix indicates a specific accuracy grade; verify if ±5 ppm or other specified tolerances meet system requirements. Consider the 1.6 V to 5.5 V operating range for voltage domain compatibility. Evaluate the need for integrated crystal versus external components based on board space constraints.

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 interface options and accuracy grades. The RX4901CE is designed for low-power applications requiring precise timekeeping without external resonators.

Real Time Clock Replacement Considerations

Direct replacements must support SPI interface and similar voltage ranges. Verify pinout compatibility before substitution. Other Epson RTC models may require firmware or hardware modifications due to register differences.