RTC-4543SA:B0 ROHS

Real Time Clock Overview

The RTC-4543SA:B0 ROHS is a Real-Time Clock (RTC) integrated circuit manufactured by Epson Timing. It features a 3-wire serial interface and is housed in a 14-SOP package with a width of 5.00mm. 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 supports a date format of YY-MM-DD-dd and a time format of HH:MM:SS (24-hour). The component is rated for an operating temperature range of -40°C to +85°C and includes leap year compensation capabilities.

Real Time Clock Feature Summary

• 3-wire serial interface for clock/calendar data access
• 14-SOP surface-mount package (5.00mm width)
• Supply voltage range of 2.5V to 5.5V
• Low power consumption: 1µA ~ 3µa @ 2V ~ 5V

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Consumer electronics with calendar functionality
• Data logging devices needing backup power support

Real Time Clock Procurement Notes

This component is listed as obsolete or end-of-life by the manufacturer. Availability is restricted, and distributors may not stock this item in the user's region. Verification of current supply status and potential obsolescence notifications is required before procurement planning.

Real Time Clock Selection Notes

Select this part only if a 14-pin SOP footprint is available and a 3-wire serial interface is compatible with the system design. Ensure the application environment stays within the -40°C to +85°C temperature range. Verify that the 2.5V to 5.5V supply voltage aligns with the target board's power rails.

Real Time Clock Part Context

This part belongs to the Epson RTC-4543SA series of real-time clocks. It shares core specifications with variants like the RTC-4543SA:A:PURE SN but differs in packaging and specific suffix designations. The B0 suffix typically indicates a tape-and-reel packaging configuration compared to bulk options found in other variants.

Real Time Clock Replacement Considerations

Direct replacement parts are limited due to the end-of-life status. Consider evaluating the RTC-4574SA series for similar 14-SOP form factors, though interface and voltage specifications must be cross-checked against the datasheet.