RA-4565SA B3 PURE SN

Real Time Clock Overview

The RA-4565SA B3 PURE SN is a real-time clock module manufactured by Seiko Epson Corporation, designed for automotive applications. It features a built-in frequency-adjusted 32.768 kHz crystal unit and operates via a 4-wire serial interface (SPI). The device supports a wide operating voltage range of 1.6 V to 5.5 V and maintains timekeeping functionality within a voltage range of 1.5 V to 5.5 V. It functions reliably in an extended temperature range from -40 °C to +125 °C. Key technical specifications include a maximum clock frequency of 0.032 MHz, interrupt capabilities, and auto leap year correction. The component is housed in a PDSO14 (SOP-14) package.

Real Time Clock Feature Summary

• Built-in frequency-adjusted 32.768 kHz crystal unit
• 4-wire serial interface (SPI-Bus)
• Wide operating voltage range: 1.6 V to 5.5 V
• Extended operating temperature range: -40 °C to +125 °C

Real Time Clock Applications

• Car audio systems
• Car navigation systems
• ECU sub clocks

Real Time Clock Procurement Notes

Verify the specific suffix 'B3 PURE SN' against official Seiko Epson documentation to confirm pinout compatibility and RoHS status. Ensure the ordering code matches the exact automotive-grade variant required for your design. Cross-reference the datasheet for any specific handling or storage requirements associated with this part number.

Real Time Clock Selection Notes

Select this component when an automotive-grade real-time clock with integrated crystal and SPI interface is required. It is suitable for designs needing operation up to 125 °C and support for voltages down to 1.5 V for backup power. Verify that the 4-wire serial protocol aligns with the host microcontroller's available interfaces.

Real Time Clock Part Context

This part belongs to the RA-4565SA series of real-time clock modules specifically engineered for automotive environments. The series is characterized by its robustness in high-temperature conditions and integration of the timing crystal, reducing board space and complexity for vehicle electronics such as navigation and engine control units.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Seiko Epson's official substitution guide or contact the manufacturer directly for qualified alternatives compatible with the RA-4565SA series.