RX4111CE B6

Real Time Clock Overview

The RX4111CE B6 is a real-time clock (RTC) module manufactured by Epson Timing. It integrates a 32.768 kHz crystal within a compact 3.2 mm x 2.5 mm SMD package, eliminating the need for external oscillators. The device operates on a supply voltage range of 1.6 V to 5.5 V and supports a Serial 4-Wire SPI bus interface. It features automatic power switching between main supply and backup battery, consuming approximately 100 nA in backup mode. The component functions within an operating temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Integrated 32.768 kHz crystal oscillator in 10-SMD (3.2x2.5 mm) package
• SPI 4-wire serial bus interface
• Automatic backup switching with ~100 nA standby current
• Built-in alarm, wake-up timer, and self-monitoring capabilities

Real Time Clock Applications

• Security systems
• Wearable devices
• IoT equipment
• Industrial automation
• Battery management systems

Real Time Clock Procurement Notes

Verify the specific suffix 'B6' against official Epson documentation to confirm frequency accuracy specifications, as variants like 'A3' differ in ppm tolerance. Confirm packaging format requirements, such as cut tape or reel quantities, directly with authorized distributors. Ensure compatibility with system voltage levels ranging from 1.6 V to 5.5 V before integration.

Real Time Clock Selection Notes

Select the RX4111CE B6 when an SPI interface is required instead of the I2C-based RX8111CE. Consider the integrated crystal feature for PCB space constraints. Verify that the 10-SMD footprint fits the design layout. Check if the specific accuracy grade associated with the 'B6' suffix meets the application's timing precision needs compared to other available suffixes.

Real Time Clock Part Context

The RX4111CE belongs to Epson’s low-power RTC family, designed to replace discrete RTC and crystal solutions. It shares core functionalities with the RX8111CE but utilizes a different communication protocol. This series targets applications requiring precise timekeeping with minimal power consumption and reduced board complexity.

Real Time Clock Replacement Considerations

The RX8111CE serves as a functional alternative but uses an I2C interface rather than SPI. Direct pin-to-pin replacement is not possible due to the interface difference. Other RX4111CE suffixes may offer different accuracy grades but share the same electrical and physical characteristics.