SI88444ED-IS

Overview

The SI88444ED-IS is a Skyworks Solutions digital isolator featuring four unidirectional channels and an integrated DC-DC converter. It provides 5000 Vrms isolation voltage using capacitive coupling technology. The device supports data rates up to 100 Mb/s with a maximum propagation delay of 23 ns. It operates within a supply voltage range of 3 V to 5.5 V and functions at temperatures from -40°C. Packaged in a 20-SOIC (0.295" width), it offers high common-mode transient immunity.

Feature Summary

• Integrates a high-frequency isolated DC-DC converter for single-supply operation
• Provides robust 5000 Vrms insulation via capacitive coupling
• Supports high-speed data transmission up to 100 Mbps

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment safety circuits
• Power electronics control interfaces

Procurement Notes

Verify the specific suffix 'IS' against official Skyworks documentation to confirm the inclusion of the integrated DC-DC converter, as this variant differs from non-integrated versions. Confirm RoHS compliance status directly with the manufacturer or authorized distributors. Check for current availability as the component may be subject to lifecycle changes.

Selection Notes

Select this component when both signal isolation and isolated power generation are required in a compact form factor. Ensure the application voltage does not exceed the 5.5 V maximum rating. Verify that the 20-SOIC package dimensions fit the PCB layout constraints. Consider the 23 ns propagation delay for timing-sensitive designs.

Part Context

This part belongs to the Si884xx family of CMOS digital isolators designed for high-reliability applications. It combines signal isolation with power conversion capabilities, reducing external component count compared to separate isolator and converter solutions. The series is certified by major global safety agencies including UL, CSA, VDE, and CQC.

Replacement Considerations

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