SI86SO21EE-IS4

Digital Isolators Overview

The SI86SO21EE-IS4 is a digital isolator from the Si86SO2x automotive series by Skyworks Solutions. It features two unidirectional channels with inverting outputs and capacitive coupling isolation technology. The device provides a 6.0 kVrms insulation voltage rating and operates within an extended temperature range of -40°C to +125°C. Packaged in an SSO-8 surface-mount format, it supports general-purpose interface applications requiring high reliability and robust signal transmission across isolation barriers.

Digital Isolators Feature Summary

• Automotive-grade qualification for enhanced reliability in vehicle environments
• Inverting output configuration for flexible logic interfacing
• Capacitive coupling isolation ensuring high common-mode transient immunity

Digital Isolators Applications

• Automotive electronic control units (ECUs)
• Industrial communication gateways
• Motor drive isolation interfaces

Digital Isolators Procurement Notes

Verify the specific suffix IS4 corresponds to the required tape-and-reel packaging quantity and moisture sensitivity level. Confirm that the inverting output polarity aligns with the system logic requirements. Ensure the SSO-8 footprint matches the PCB design guidelines provided in the official datasheet to prevent assembly defects.

Digital Isolators Selection Notes

Select this component when automotive certification and high-voltage isolation are mandatory. The inverting output characteristic distinguishes it from non-inverting variants like the SI86S621. Consider the SSO-8 package size constraints relative to available board space. Validate thermal performance under maximum operating conditions to ensure stability within the specified temperature range.

Digital Isolators Part Context

This part belongs to the Si86SO2x family, which is specifically designed for automotive applications. It shares the core isolation architecture with the standard Si86S6x series but includes additional testing and qualification processes to meet automotive industry standards. The inverting output variant offers design flexibility for systems requiring active-low signaling or inverted logic states.

Digital Isolators Replacement Considerations

Direct functional substitutes include the SI86SO20EE-IS4, which differs only by having non-inverting outputs. For non-automotive applications, the SI86S621EE-IS4 serves as a compatible alternative with identical electrical characteristics but without automotive-specific qualifications.