RX4111CE A3

Real Time Clock Overview

The EPSON RX4111CE A3 is a Real-Time Clock (RTC) IC featuring an integrated SPI interface and calendar functionality. It operates within a voltage range of 1.6V to 5.5V and consumes a maximum current of 3µA at 3V during timing operations. The device supports date formats including YY-MM-DD and time formats HH:MM:SS. It is housed in a compact 10-SMD, no-lead package with dimensions of 3.2x2.5 mm. The component is designed for surface mount installation and functions reliably across a temperature range of -40°C to 85°C.

Real Time Clock Feature Summary

• Integrated 32 kHz crystal oscillator eliminates the need for external components
• SPI 4-wire serial interface for data communication
• Automatic power switching between main supply and backup battery
• Built-in self-monitoring for crystal oscillation and voltage levels

Real Time Clock Applications

• Security systems
• Patient monitoring devices
• Wearable equipment
• Battery-powered IoT devices
• Industrial automation controllers

Real Time Clock Procurement Notes

Verify the specific suffix 'A3' against official Epson documentation to confirm it denotes a standard commercial grade variant or a specific tape-and-reel configuration. Confirm RoHS3 compliance status and ensure the 10-SMD footprint matches the target PCB design constraints before finalizing procurement orders.

Real Time Clock Selection Notes

Select this model when an SPI interface is required instead of I2C, which is used in the RX8111CE counterpart. Ensure the system design accommodates the 1.6V minimum operating voltage. The integrated crystal simplifies layout but requires adherence to the specified 3.2x2.5 mm package outline for proper soldering and thermal management.

Real Time Clock Part Context

The RX4111CE belongs to Epson's low-power RTC family, distinguished by its SPI interface compared to the I2C-based RX8111CE. Both share the same compact package and integrated crystal technology. This series targets applications requiring precise timekeeping with minimal power consumption and reduced PCB area.

Real Time Clock Replacement Considerations

The RX8111CE serves as a functional alternative if the system supports I2C rather than SPI. Verify that the pinout compatibility and software drivers are adjusted accordingly, as the communication protocol differs between these two models.