SI88640ED-IS

Overview

The SI88640ED-IS is a Skyworks Solutions digital isolator featuring four unidirectional channels and an integrated DC-DC converter. It operates within a 3 V to 5.5 V supply range, delivering a data rate of 100 Mb/s with a propagation delay of 18 ns. The device provides 5000 Vrms isolation voltage via capacitive coupling and supports a common mode transient immunity of 40 kV/µs. It is housed in a 24-SOIC-Wide package, functions across a temperature range of -40°C to +125°C, and holds AEC-Q100 qualification.

Feature Summary

• Integrates a high-efficiency isolated DC-DC converter to eliminate the need for external magnetic components.
• Utilizes proprietary capacitive coupling technology to ensure robust signal transmission across the isolation barrier.
• Features unidirectional channel configuration optimized for specific control and feedback signal paths.

Applications

• Automotive power electronics and motor control systems
• Industrial inverter and converter topologies
• Grid-connected photovoltaic (PV) inverter designs

Procurement Notes

Verify component authenticity through authorized distribution channels to mitigate counterfeit risks. Confirm that the specific suffix matches the required packaging format, as tube versus reel options exist within the family. Ensure design compliance with AEC-Q100 automotive standards if deployed in vehicle applications. Review the manufacturer's lifecycle status, as this part may be subject to discontinuation notices.

Selection Notes

Select this model when a 5000 Vrms isolation rating is mandatory for safety-critical interfaces. The integrated DC-DC converter simplifies board layout by removing external transformer requirements. Choose this variant over bidirectional models when signal flow is strictly input-to-output. Validate thermal performance against the specified 125°C maximum junction temperature limit during system integration.

Part Context

This component belongs to the Si886xx series of high-speed digital isolators from Skyworks Solutions. The series is engineered for demanding environments requiring reliable galvanic isolation between low-voltage logic and high-voltage power stages. The specific ED-IS designation indicates the wide SOIC package and standard insulation characteristics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative Skyworks variants such as the SI88640EC-IS, noting differences in insulation voltage ratings and package dimensions before implementation.