SI88443EC-ISR

Overview

The SI88443EC-ISR is a Skyworks digital isolator featuring four unidirectional channels and an integrated DC-DC converter. It provides 3750 Vrms insulation via capacitive coupling in a 20-SOIC-Wide package. The device supports data rates up to 100 Mb/s with a propagation delay of 18 ns. Operating voltage ranges from 3 V to 5.5 V, with a maximum power dissipation of 2.27 W. It functions within a temperature range of -40°C to +125°C and includes a shutdown feature.

Feature Summary

• Integrates a high-efficiency DC-DC converter for isolated power supply
• Provides robust capacitive coupling isolation technology
• Includes dedicated shutdown control for power management

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment signal transmission interfaces
• Power electronics monitoring circuits

Procurement Notes

Verify the specific suffix 'EC' against official Skyworks documentation to confirm the 3750 Vrms insulation rating, as variations exist within the Si88443 family. Confirm the 'ISR' suffix indicates reel packaging and check for any recent lifecycle status changes such as NRND designation before finalizing procurement plans.

Selection Notes

Select this component when a single-channel DC-DC converter and three additional signal isolation channels are required in a compact form factor. Ensure the application demands unidirectional signal flow and operates within the specified 3 V to 5.5 V supply range. Verify that the 100 Mb/s data rate meets system timing requirements.

Part Context

This part belongs to the Si88443 series of general-purpose digital isolators. It utilizes Skyworks' proprietary capacitive coupling technology to achieve high reliability and low power consumption compared to legacy isolation methods. The series is designed for applications needing multiple isolated channels with integrated power conversion capabilities.

Replacement Considerations

SI88443ED-ISR offers similar functionality but with a higher 5000 Vrms insulation rating. SI88443BC-ISR provides comparable features with a 3750 Vrms rating but may differ in specific electrical characteristics or packaging details. Verify pin compatibility and insulation ratings before substitution.