RX-4571NB:B3 PURE SN

Real Time Clock Overview

The RX-4571NB:B3 PURE SN is a Real-Time Clock (RTC) module manufactured by Epson Timing. It features a built-in 32.768 kHz crystal unit factory-adjusted for frequency accuracy. The device utilizes a 3-wire serial interface with an operating voltage range of 1.6 V to 5.5 V. It is housed in a compact 22-pin SON package designed for surface mount applications. The component supports clock/calendar functions and operates within a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Built-in 32.768 kHz crystal unit factory-adjusted for frequency accuracy
• Compact 22-pin SON package suitable for space-constrained designs
• Low backup voltage capability for extended battery life

Real Time Clock Applications

• Embedded systems requiring precise timekeeping
• Consumer electronics with limited board space
• Industrial control units needing reliable clock/calendar data

Real Time Clock Procurement Notes

Verify the current manufacturing status as this specific part number may be obsolete or discontinued. Confirm availability of equivalent substitutes if production is halted. Ensure the replacement component matches the 22-pin SON footprint and 3-wire serial interface requirements. Check RoHS compliance documentation for regulatory adherence. Validate supply chain sources for genuine Epson Timing products to avoid counterfeit components.

Real Time Clock Selection Notes

Select this component when a low-profile RTC with integrated crystal is required. The 3-wire serial interface reduces pin count compared to I2C or SPI alternatives. Consider the 1.6 V to 5.5 V supply range for compatibility with various logic levels. Evaluate the -40°C to +85°C operating range against environmental conditions. Verify that the 22-pin SON package fits within the designated PCB area constraints.

Real Time Clock Part Context

This model belongs to the RX-4571 series of real-time clock modules from Epson Timing. The series is characterized by integrated crystal units and serial interfaces. The NB variant specifically denotes the 22-pin SON packaging format. This family targets applications demanding high accuracy and small form factors in embedded timing solutions.

Real Time Clock Replacement Considerations

RX4901CE XS A06 is listed as a similar available substitute. Verify pinout compatibility and interface protocol alignment before substitution. Ensure the alternative maintains the required 3-wire serial communication standard.