RTC-4543SA:A3 ROHS

Real Time Clock Overview

The EPSON RTC-4543SA:A3 ROHS is a Real-Time Clock (RTC) integrated circuit designed for precise timekeeping and calendar functions. It features a 3-wire serial interface and operates within a supply voltage range of 2.5V to 5.5V. The device supports date formats including YY-MM-DD-DD and time formats in HH:MM:SS (24-hour). Key electrical specifications include a maximum current consumption of 1µA to 3µA at voltages between 2V and 5V. It is housed in a 14-SOP package with a width of 0.197 inches (5.00mm) and is rated for an operating temperature range of -40°C to 85°C.

Real Time Clock Feature Summary

• 3-wire serial interface for data communication
• Integrated leap year compensation
• Low power consumption ranging from 1µA to 3µa

Real Time Clock Applications

• Industrial equipment requiring accurate time synchronization
• Consumer electronics with real-time clock needs
• Automotive systems operating in extended temperature ranges

Real Time Clock Procurement Notes

This component is identified as End-of-Life (EOL) by the manufacturer, indicating it will be discontinued. Availability is currently restricted or limited. Buyers should verify stock status carefully and consider alternative sourcing options due to the discontinuation notice issued in late 2024.

Real Time Clock Selection Notes

Select this part only if compatibility with the 14-SOP footprint and 3-wire serial protocol is required. Ensure the system design accommodates the 2.5V to 5.5V supply range. Due to its EOL status, engineers should evaluate replacement components that match the pinout and electrical characteristics before finalizing designs.

Real Time Clock Part Context

The RTC-4543SA belongs to Epson's RTC-4543SA series of real-time clock ICs. This specific model variant includes RoHS compliance markings. It shares core functionalities with other models in the series but differs in packaging and specific suffix designations related to material composition and environmental standards.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Given the EOL status, users must identify compatible alternatives based on functional equivalence and physical dimensions.