SI8631ET-IS

Digital Isolators Overview

The SI8631ET-IS is a three-channel digital isolator from Skyworks Solutions, designed for robust signal transmission across isolation barriers. It features unidirectional data flow with two forward channels and one reverse channel. The device operates on a single supply voltage ranging from 2.5 V to 5.5 V and supports data rates up to 150 Mb/s. It provides 5000 Vrms isolation voltage and withstands 10 kV surge capability. Key electrical parameters include a maximum propagation delay of 13 ns and common mode transient immunity of 60 kV/µs. It is housed in a 16-pin SOIC-Wide package.

Digital Isolators Feature Summary

• Provides high-speed digital signal isolation with 150 Mbps data rate capability
• Features 10 kV surge withstand capability for harsh industrial environments
• Integrates shutdown functionality to minimize power consumption during idle states
• Utilizes capacitive coupling technology for reliable galvanic isolation

Digital Isolators Applications

• Industrial automation and control systems requiring robust isolation
• Power electronics monitoring and gate drive applications
• Medical equipment needing high-voltage isolation safety
• Communication interfaces in noisy electromagnetic environments

Digital Isolators Procurement Notes

Verify the specific suffix IS against other variants like IS1 or IS2, as these denote different insulation ratings and package types. Confirm that the 10 kV surge rating aligns with your system's transient requirements. Ensure the SOIC-Wide-16 footprint matches your PCB layout constraints. Check for AEC-Q100 qualification if automotive compliance is required, noting that this specific variant may differ from automotive-grade counterparts.

Digital Isolators Selection Notes

Select this component when high surge immunity and moderate speed are prioritized over ultra-low latency. Compare against the SI8631EC-B-IS1 for higher insulation ratings or the SI8631AB-B-IS1 for lower cost options with reduced performance. Consider the 13 ns propagation delay limit for timing-critical designs. Evaluate the 60 kV/µs CMTI for noise-heavy applications where signal integrity is paramount.

Digital Isolators Part Context

This part belongs to the Si863x family of digital isolators, which offers various channel configurations and isolation levels. The ET-IS variant specifically targets applications demanding high surge tolerance alongside standard digital isolation. It complements other Skyworks isolators by providing a balance between speed, isolation strength, and package availability in the SOIC-Wide form factor.

Digital Isolators Replacement Considerations

Direct substitutes include SI8631EC-B-IS1 for higher insulation (3750 Vrms) or SI8631AB-B-IS1 for lower speed (1 Mb/s). Verify pinout compatibility and thermal characteristics before swapping. Ensure the replacement meets the 10 kV surge requirement if present in the original design.