RX-8581SA:B3:ROHS

Real Time Clock Overview

The RX-8581SA:B3:ROHS is a Real Time Clock (RTC) module manufactured by Epson. It operates within a voltage range of 1.7V to 5.5V and utilizes an I2C bus interface for communication. The device features a built-in 32.768kHz crystal unit with a frequency accuracy of +/-23ppm. It supports clock and calendar functions, including leap year compensation, and is designed for low current consumption. The component is housed in a 14-SOIC package and operates across a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Integrated 32.7kHz crystal unit for precise timekeeping
• Wide operating voltage range supporting 1.7V to 5.5V
• Built-in calendar function with leap year compensation
• Low current consumption design suitable for battery-backed applications

Real Time Clock Applications

• Wearable devices requiring compact clock solutions
• Portable electronic equipment needing accurate timekeeping
• Battery-powered systems utilizing RTC functionality

Real Time Clock Procurement Notes

This specific part number is listed as obsolete or no longer manufactured by the supplier. Verify availability through authorized distributors or secondary markets. Confirm RoHS compliance status directly with the seller, as documentation may vary. Check for tariff implications if shipping to the United States. Ensure the replacement component matches the original pinout and electrical specifications.

Real Time Clock Selection Notes

Select this component only if legacy compatibility is required for existing designs. Consider the wide voltage range for flexible power supply integration. Evaluate the SOIC-14 package size against board space constraints. Verify that the I2C interface speed requirements align with the system controller capabilities. Assess the need for built-in crystal versus external oscillator options.

Real Time Clock Part Context

The RX-8581SA series represents Epson's line of compact real-time clock modules. This variant includes the B3 suffix indicating specific ordering or packaging details and ROHS designation for environmental compliance. It belongs to the broader category of I2C-bus RTC ICs designed for consumer electronics and portable devices where space and power efficiency are critical factors.

Real Time Clock Replacement Considerations

No public confirmed substitute part numbers are available in the provided data. Consult Epson technical support for direct replacements or compatible alternatives from other manufacturers that match the 14-SOIC footprint and I2C interface.