RX4111CE BB

Real Time Clock Overview

The RX4111CE BB is a real-time clock (RTC) module manufactured by Epson Timing. It features an SPI bus interface and operates within a supply voltage range of 1.6 V to 5.5 V. The device supports automatic power switching between main and backup supplies, with a backup switching threshold of 1.2 V minimum. Key functionalities include a wake-up timer, timestamp generation, alarm capabilities, and self-monitoring for crystal stoppage and voltage drops. It is housed in a compact SMD package suitable for space-constrained applications.

Real Time Clock Feature Summary

• SPI Bus Interface: Serial 4-Wire communication protocol for data exchange.
• Low Power Operation: Wide supply voltage range from 1.6 V to 5.5 V.
• Backup Switching: Automatic transition to backup power at 1.2 V minimum threshold.
• Integrated Functions: Includes wake-up timer, timestamp, alarm, and self-monitoring interrupts.

Real Time Clock Applications

• Factory automation equipment
• Office equipment
• Handheld terminals
• Security devices

Real Time Clock Procurement Notes

Verify the specific suffix 'BB' against official Epson documentation to confirm accuracy, as standard listings often use suffixes like A3 or B3. Confirm package availability and lead times directly with authorized distributors. Ensure the selected variant matches the required frequency tolerance and packaging format for the target design.

Real Time Clock Selection Notes

Select this component when an SPI interface is preferred over I2C for RTC functionality. Consider the 1.6 V to 5.5 V operating range for compatibility with various system voltages. Evaluate the need for specific features such as the wake-up timer or timestamp generation before finalizing the part number suffix.

Real Time Clock Part Context

The RX4111CE series comprises low-power RTC modules designed for embedded systems. Variants within the series differ primarily in frequency tolerance (e.g., ±11.5 ppm vs. ±23 ppm) and packaging quantities. The RX4111CE BB belongs to this family, sharing core architectural features while potentially differing in specific performance grades or reel specifications.

Real Time Clock Replacement Considerations

Direct replacements within the same family include RX4111CE A3 and RX4111CE B3. Verify that substitute parts match the required accuracy and interface configuration. Cross-referencing with other manufacturers requires careful evaluation of pin compatibility and software register mapping differences.