SI88442EC-AS

Overview

The SI88442EC-AS is a unidirectional digital isolator from the Si88442 series, manufactured by Skyworks Solutions. It features four channels (two forward, two reverse) with a data rate of 100 Mb/s and an insulation voltage of 5000 Vrms. The device operates within a supply voltage range of 3 V to 5.5 V and exhibits a propagation delay of 18 ns. It supports rise and fall times of 2.5 ns maximum, with a pulse width distortion of 4.5 ns. Operating temperatures span from -40°C to +125°C. The component is housed in a 20-SOIC package.

Feature Summary

• Unidirectional signal transmission across four isolated channels
• Integrated capacitive coupling isolation technology
• High-speed data transfer capability at 100 Mb/s
• Extended industrial temperature operation range

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment signal interfacing
• Power electronics control circuits
• General-purpose digital isolation interfaces

Procurement Notes

Verify the specific suffix AS against official Skyworks documentation to confirm pinout and packaging details. Ensure compatibility with 3V to 5.5V logic levels. Confirm humidity sensitivity handling requirements during storage and assembly. Cross-reference the 5000 Vrms rating with system safety standards. Validate the SOIC-20 footprint dimensions for PCB layout accuracy.

Selection Notes

Select this component when unidirectional isolation is required without integrated power conversion. Compare the 5000 Vrms insulation rating against lower-rated alternatives like the ISR variant if higher isolation is needed. Consider the 18 ns propagation delay for timing-critical applications. Evaluate the 20-SOIC package size constraints relative to other channel counts.

Part Context

This part belongs to the Si88442 family of high-speed digital isolators. It differs from variants like the EC-IS or EC-ISR by lacking an integrated DC-DC converter, relying instead on external power supplies for both sides. The AS suffix typically denotes a tube packaging option compared to reel options found in other suffixes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.