SI88444EC-ASR

Overview

The SI88444EC-ASR is a four-channel digital isolator from Skyworks Solutions, housed in a 20-SOIC package. It supports data rates up to 100 Mb/s with a propagation delay of 18 ns and rise/fall times of 2.5 ns. The device operates on a supply voltage between 3 V and 5.5 V. It provides an isolation voltage of 5000 Vrms and withstands a common-mode transient immunity of 40 kV/µs. The component functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates four independent unidirectional signal channels for general-purpose isolation.
• Utilizes capacitive coupling technology to achieve high-voltage electrical isolation.
• Features integrated DC-DC converter capability for isolated power generation.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment signal interfacing
• Power electronics control circuits

Procurement Notes

Verify the specific suffix ASR against official Skyworks documentation to confirm tape-and-reel packaging and moisture sensitivity classification. Ensure the design accounts for the required isolation creepage distances associated with the SOIC-20 package width. Confirm RoHS compliance status through the manufacturer's current datasheet before final procurement.

Selection Notes

Select this component when four isolated channels are required alongside integrated power conversion capabilities. The 100 Mb/s data rate suits moderate-speed digital communication interfaces. Consider the 5000 Vrms isolation rating for applications demanding robust noise immunity in high-voltage environments compared to lower-rated alternatives.

Part Context

This part belongs to the Si8844x family of digital isolators. It shares the same core architecture as the SI88444EC-AS but differs in packaging format. The series is designed for general-purpose applications where space efficiency and high reliability are critical requirements for system designers.

Replacement Considerations

The SI88444EC-AS serves as a tube-packaged equivalent. Verify pinout compatibility and ensure the alternative meets the same 5000 Vrms isolation and 100 Mb/s speed specifications before substitution.