RTC-4543SA:B3 ROHS

Real Time Clock Overview

The EPSON RTC-4543SA:B3 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 consumes a maximum current of 1µA to 3µA at 2V to 5V. It supports YY-MM-DD-DD date formats and HH:MM:SS (24-hour) time formats, including leap year compensation. The component is housed in a 14-SOP (0.197", 5.00mm wide) surface-mount package 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 calendar with leap year compensation
• Low power consumption: 1µA ~ 3µa @ 2V ~ 5V
• Wide operating voltage: 2.5V to 5.5V

Real Time Clock Applications

• Data logging systems requiring accurate timestamping
• Industrial control equipment operating in wide temperature ranges
• Portable electronic devices utilizing low-power real-time clocking

Real Time Clock Procurement Notes

This component is listed as End-of-Life (EOL) by the manufacturer. Availability is restricted, and distributors may not stock this item in all regions. Verification of current stock status and alternative sourcing strategies is required before procurement planning. Ensure compliance with RoHS3 specifications as indicated in product documentation.

Real Time Clock Selection Notes

Select this part when a 14-pin SOP package and 3-wire serial interface are required. Verify that the system voltage falls within the 2.5V to 5.5V range. Consider the EOL status and limited availability when designing new products; legacy designs should account for obsolescence management.

Real Time Clock Part Context

The RTC-4543SA series belongs to Epson Timing's line of real-time clock ICs. The ':B3' suffix typically denotes specific packaging or environmental compliance variations, such as RoHS compliance. This model is part of the broader RTC-4543 family, which offers various pin counts and interface options for different application needs.

Real Time Clock Replacement Considerations

Due to the End-of-Life status, direct substitutes may be limited. Review Epson's official discontinuation notices for recommended replacement parts within the same family or newer generations. Verify pin compatibility and electrical parameters before considering any cross-references.