SI88443EC-ASR

Overview

The SI88443EC-ASR is a unidirectional digital isolator from the Si88443 series, manufactured by Skyworks Solutions. It features four channels with one forward and three reverse paths, housed in a 20-pin SOIC package. The device operates on a supply voltage between 3 V and 5.5 V, supporting data rates up to 100 Mb/s. It provides an isolation voltage of 5000 Vrms with a propagation delay of 18 ns. The component functions within a temperature range of -40°C to +125°C and lacks a shutdown pin.

Feature Summary

• Provides galvanic isolation via capacitive coupling technology for signal transmission across isolated domains.
• Supports high-speed digital communication with a maximum data rate of 100 Mb/s and low pulse width distortion.
• Features a robust insulation rating of 5000 Vrms to ensure safety and noise immunity in electrically noisy environments.

Applications

• Industrial automation systems requiring reliable signal isolation between control and power stages.
• Medical equipment interfaces needing certified isolation for patient safety compliance.
• Power electronics monitoring circuits where high common-mode transient immunity is critical.

Procurement Notes

Verify the specific suffix ASR indicates reel packaging when ordering. Confirm that the 20-SOIC footprint matches the target PCB design. Check current availability status as distribution may be limited. Ensure the unidirectional channel configuration aligns with system signal flow requirements before finalizing procurement.

Selection Notes

Select this part for applications requiring four-channel unidirectional isolation without shutdown functionality. Compare against SI88443ED-ASR if bidirectional or integrated DC-DC capabilities are needed. Verify that the 18 ns propagation delay meets timing constraints. Ensure the operating temperature range covers the intended environmental conditions.

Part Context

This component belongs to the Si88443 family of digital isolators designed for general-purpose applications. It utilizes Skyworks' proprietary capacitive coupling technology to achieve high isolation performance. The device is classified under interface ICs and serves as a key element in modern isolated communication architectures.

Replacement Considerations

SI88443EC-AS is a tube-packaged variant of the same electrical specification. SI88443ED-ASR offers similar isolation but includes an integrated DC-DC converter. Verify pin compatibility and functional equivalence before substituting any alternative part numbers.