RTC-4543SA:B3:PURE SN

Real Time Clock Overview

The RTC-4543SA:B3:PURE SN is a Real Time Clock (RTC) manufactured by Epson Timing. It operates within a supply voltage range of 1.25 V to 5.5 V and supports I2C and SPI bus interfaces. The device provides timekeeping capabilities with an accuracy of +/-23ppm at room temperature. It features an integrated backup switching mechanism to maintain operation during primary power loss. The component is housed in a 14-pin SOP package and is designed for industrial applications, functioning reliably across a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Integrated backup switching for continuous timekeeping
• Supports I2C and SPI serial communication protocols
• Industrial temperature range (-40°C to +85°C)
• Wide operating voltage range (1.25 V to 5.5 V)

Real Time Clock Applications

• Industrial control systems requiring precise timing
• Data logging equipment
• Embedded systems with intermittent power sources

Real Time Clock Procurement Notes

This component is designated as End-of-Life (EOL). Manufacturers have issued discontinuance notifications indicating that production will cease. Availability is restricted, and sourcing may require checking existing distributor stock or evaluating alternative components. Verify current lifecycle status directly with the manufacturer before procurement planning.

Real Time Clock Selection Notes

Select this part only if legacy compatibility is required, as it is being discontinued. Ensure the design supports the specific 14-pin SOP footprint. Consider the wide voltage range and dual interface support when integrating with microcontrollers. Evaluate replacement options early due to limited future availability.

Real Time Clock Part Context

The RTC-4543SA series belongs to Epson's lineup of real-time clock ICs. This specific model variant includes the B3 suffix and PURE SN designation, indicating specific pinout or material compliance configurations within the family. It is distinct from other variants like the SA:A3 based on internal configuration details defined in the official datasheet.

Real Time Clock Replacement Considerations

Due to the EOL status, verify compatible substitutes such as the RTC-4543SA:A3:PURE SN or other Epson RTC models with similar pinouts and specifications. Cross-reference electrical parameters and interface requirements carefully.