RX-8581JE:B0

Overview

The RX-8581JE:B0 is a Real Time Clock (RTC) integrated circuit designed for accurate timekeeping and calendar functions. It operates within a supply voltage range of 1.8V to 5.5V and utilizes an I2C interface for communication. The device features a 32.768kHz frequency and maintains a precision of ±5ppm. It is housed in a VSOJ-20 package with dimensions of 7.0 x 6.0 x 1.5 mm. The component supports a wide operating temperature range from -40°C to +85°C.

Feature Summary

• Provides accurate timekeeping and calendar functionality
• Supports I2C bus communication interface
• Operates across a wide voltage range of 1.8V to 5.5V

Applications

• Embedded systems requiring precise time synchronization
• Data logging devices needing calendar tracking
• Industrial equipment with wide temperature operation requirements

Procurement Notes

This component is classified as End of Life and scheduled for obsolescence by the manufacturer. Procurement should focus on verifying availability through authorized distributors or checking for valid substitute part numbers that maintain compatible electrical specifications and pin configurations. Ensure any replacement meets the original design's voltage and interface requirements.

Selection Notes

Select this RTC when high accuracy is required alongside standard I2C connectivity. The ±5ppm precision suits applications where drift must be minimized without external calibration. Verify that the system power supply falls within the 1.8V to 5.5V range. Consider the VSOJ-20 package size constraints during PCB layout planning.

Part Context

The RX-8581JE series includes variants such as the RX-8581NB and RX-8581SA, all sharing similar B=5+/-23PPM characteristics. This specific model represents a discontinued generation of Epson's RTC portfolio, often replaced by newer iterations in modern designs.

Replacement Considerations

Public confirmed substitutes include similar models from the same family. Verify compatibility before substitution due to the obsolete status.