RTC-4543SA:A:PURE SN

Real Time Clock Overview

The EPSON RTC-4543SA:A:PURE SN is a Real-Time Clock (RTC) IC belonging to the RX-4045SA series. It features a Serial 4-Wire interface and operates within a supply voltage range of 1.7 V to 5.5 V. The device supports standard date formats (YY-MM-DD-dd) and time formats (HH:MM:SS, 24-hour). It is housed in a 14-SOP package and functions as a clock/calendar timer with alarm capabilities. The component is designed for surface mount installation and operates across a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Serial 4-Wire bus interface for data communication
• Integrated calendar and clock functionality with alarm features
• Wide operating voltage range from 1.7 V to 5.5 V
• Available in 14-SOP surface-mount package

Real Time Clock Applications

• General-purpose timing in consumer electronics
• Industrial equipment requiring precise timekeeping
• Metering devices utilizing serial communication interfaces

Real Time Clock Procurement Notes

Verify the specific suffix 'A' against official Epson documentation to confirm pinout and electrical characteristics, as suffixes often denote manufacturing revisions or specific configuration options. Ensure the Serial 4-Wire interface compatibility with the host microcontroller before integration. Check RoHS compliance status directly from the manufacturer's datasheet for regulatory requirements.

Real Time Clock Selection Notes

Select this model when a Serial 4-Wire interface is required instead of the more common I2C or SPI protocols found in other RX series variants. The 14-SOP package is suitable for applications where larger footprint is acceptable but through-hole mounting is not desired. Consider the 1.7V minimum voltage if powering from low-voltage sources.

Real Time Clock Part Context

This component is part of the Epson RX-4045SA family of real-time clocks. The 'SA' designation indicates the SOP-14 package type, which is distinct from the smaller CE or SJ packages used in other models. This series is positioned for general industrial and consumer applications requiring reliable timekeeping with a specific serial interface.

Real Time Clock Replacement Considerations

Direct replacements must support the Serial 4-Wire interface and 14-SOP package. Cross-referencing with other Epson RX series parts requires verifying interface compatibility, as many alternatives use I2C or SPI.