SI88421ED-IS

Digital Isolators Overview

The SI88421ED-IS is a general-purpose digital isolator manufactured by Skyworks Solutions Inc. It features two unidirectional channels with a data rate of 100 Mb/s and an isolation voltage of 5000 Vrms. The device operates within a supply voltage range of 3 V to 5.5 V, drawing a typical operating current of 8 mA. Key electrical parameters include a propagation delay of 18 ns, rise and fall times of 2.5 ns, and a pulse width distortion of 4.5 ns. It supports a common-mode transient immunity of 40 kV/µs and functions across a temperature range of -40°C to +125°C in a 16-SOIC package.

Digital Isolators Feature Summary

• Integrates high-speed capacitive coupling technology for reliable signal transmission across isolation barriers.
• Includes an integrated secondary sensing feedback-controlled DC-DC converter for isolated power generation.
• Provides robust protection against common-mode transients with specified immunity ratings.

Digital Isolators Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing high-voltage safety compliance
• Power electronics control circuits

Digital Isolators Procurement Notes

Verify the specific suffix 'ED' corresponds to the SOIC-16 wide package and reel packaging configuration. Confirm that the integrated DC-DC converter functionality aligns with system power requirements. Check for AEC-Q100 qualification status if automotive applications are intended. Ensure compatibility with existing PCB footprints for 16-SOIC components.

Digital Isolators Selection Notes

Select this component when bidirectional or multi-channel isolation is not required, as it offers only unidirectional paths. Consider the integrated DC-DC converter capability if isolated power is needed without external magnetics. Evaluate the 100 Mb/s speed against system timing constraints. Compare thermal performance and power dissipation limits against enclosure conditions.

Digital Isolators Part Context

This part belongs to the Si8842x series of digital isolators from Skyworks Solutions. It is designed for applications demanding high reliability and compact form factors. The series typically includes variants with different channel counts and packaging options to suit diverse interface needs.

Digital Isolators Replacement Considerations

SI88421EC-IS is listed as a similar alternative within the same manufacturer portfolio. External equivalents such as ISO7421EQDWRQ1 may be considered for cross-manufacturer sourcing, though pinout and feature verification is essential.