RTC-4543SA:B ROHS

Real Time Clock Overview

The EPSON RTC-4543SA:B ROHS is a Real-Time Clock (RTC) integrated circuit belonging to the RTC-4543SA series. It features a 3-wire serial interface and supports date formats including YY-MM-DD-DD and time formats in HH:MM:SS (24-hour). The device operates within a supply voltage range of 2.5V to 5.5V and draws a maximum current of 1µA to 3µA at voltages between 2V and 5V. It is housed in an 18-SOP package with a width of 0.213 inches (5.40mm). The component is rated for industrial operating temperatures from -40°C to +85°C.

Real Time Clock Feature Summary

• Supports leap year calculation
• Features 3-wire serial communication interface
• Operates on 2.5V to 5.5V supply voltage
• Low power consumption of 1µA to 3µa

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Data logging equipment
• Embedded systems with limited power budgets

Real Time Clock Procurement Notes

This component is marked as End-of-Life (EOL) by the manufacturer. Distribution availability is restricted, and Mouser indicates that the product is not currently sold in certain regions. Buyers should verify stock status carefully and consider alternative sourcing strategies due to discontinuation.

Real Time Clock Selection Notes

Select this part only if compatibility with the RTC-4543SA series architecture is required. Verify that the 18-SOP footprint matches the PCB design. Ensure the system can accommodate the 3-wire serial protocol. Due to EOL status, evaluate long-term supply chain risks before finalizing the design.

Real Time Clock Part Context

The RTC-4543SA series includes variants such as RTC-4543SA:A and RTC-4543SB:B3. These components are manufactured by Epson Timing and fall under the Clock & Timer ICs subcategory. They are designed for applications needing accurate calendar and time functions in compact surface-mount packages.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Given the End-of-Life status, engineers must identify pin-compatible or functionally equivalent alternatives through independent cross-reference tools or direct manufacturer consultation.