SI8640EB-B-IUR

Digital Isolators Overview

The SI8640EB-B-IUR is a general-purpose digital isolator from the Si864x series, manufactured by Skyworks Solutions. It features four unidirectional channels with capacitive coupling isolation technology. The device supports a data rate of 150 Mb/s and offers an insulation voltage of 2500 Vrms. It operates within a supply voltage range of 2.375 V to 5.5 V. Key electrical parameters include a propagation delay of 8 ns, rise/fall times of 4 ns, and a pulse width distortion of 4.5 ns. The component is housed in a QSOP-16 package and functions reliably across an operating temperature range of -40°C to +125°C.

Digital Isolators Feature Summary

• Integrates four independent unidirectional signal paths for high-density channel isolation
• Utilizes silicon dioxide-based capacitive coupling for robust signal transmission
• Includes on-chip DC/DC converter capability for isolated power delivery support

Digital Isolators Applications

• General-purpose digital signal isolation in industrial systems
• Isolation interfaces for microcontroller units (MCUs) and field programmable gate arrays (FPGAs)
• Communication bus isolation in automotive electronic control units

Digital Isolators Procurement Notes

Verify that the ordering suffix 'IUR' corresponds to the tape-and-reel packaging format rather than tube packaging. Confirm the specific insulation voltage rating matches the application requirements, as variants within the Si864x family may differ. Ensure the QSOP-16 footprint aligns with the printed circuit board design constraints. Check for AEC-Q100 qualification status if automotive reliability standards are mandatory for the deployment environment.

Digital Isolators Selection Notes

Select this component when four-channel unidirectional isolation is required with moderate speed capabilities up to 150 Mb/s. The choice is appropriate for designs needing 2500 Vrms basic isolation without the higher cost or complexity of reinforced isolation ratings. Consider the thermal performance and power dissipation limits relative to the ambient operating conditions. Evaluate the need for shutdown functionality if power management during idle states is critical for the system architecture.

Digital Isolators Part Context

This part belongs to the Si864x family of digital isolators, which combines high-speed signal isolation with integrated power conversion options. The family is designed to replace traditional optocouplers, offering superior performance in speed, size, and reliability. The SI8640EB variant specifically targets applications requiring reliable galvanic isolation between low-voltage logic circuits and higher potential domains.

Digital Isolators Replacement Considerations

Direct replacements within the same manufacturer line include SI8640BA-B-IU and SI8640EC-B-IS1, though these differ in insulation voltage ratings and package types. Cross-manufacturer equivalents require careful verification of pinout compatibility and electrical parameter margins to ensure functional interchangeability.