SI88641EC-ISR

Overview

The SI88641EC-ISR is a unidirectional digital isolator from Skyworks Solutions, utilizing capacitive coupling technology. It features four channels configured as three forward and one reverse path. The device supports data rates up to 100 Mb/s with a propagation delay of 18 ns. It operates on a supply voltage range of 3 V to 5.5 V and provides an insulation voltage of 5000 Vrms. The component is housed in a SOIC-24 package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Unidirectional signal transmission via capacitive coupling
• Integrated high-voltage isolation barrier
• General-purpose digital interface capability

Applications

• Industrial communication interfaces
• Medical equipment signal isolation
• Power electronics control circuits

Procurement Notes

Verify the specific suffix 'ISR' confirms the tape-and-reel packaging format against your assembly requirements. Confirm that the SOIC-24 footprint matches your PCB layout constraints. Ensure the 5000 Vrms isolation rating meets your system's safety standards. Check for AEC-Q100 qualification if automotive application is intended, as this variant may differ from other series members.

Selection Notes

Select this part when unidirectional isolation is required with moderate speed needs. The 100 Mb/s rate suits many industrial protocols. The SOIC-24 package offers ample pin spacing for manual handling or standard SMT processes. Consider power consumption and thermal dissipation capabilities relative to your enclosure design.

Part Context

This component belongs to the Si8864x family of digital isolators. These devices are designed for robust noise immunity in electrically noisy environments. The family typically includes variants with integrated DC-DC converters or different channel configurations. This specific model focuses on pure isolation without onboard power conversion.

Replacement Considerations

Direct replacements include other SI88641 variants with different packaging suffixes such as SI88641EC-TB or SI88641EC-IS, provided the channel configuration and electrical parameters remain identical. Verify pinout compatibility before substitution.