SI88443BC-IS

Overview

The SI88443BC-IS is a general-purpose digital isolator manufactured by Skyworks Solutions Inc. It features four unidirectional channels with integrated DC-DC converter capability, supporting data rates up to 100 Mbps. The device provides an insulation voltage of 5000 Vrms and a common-mode transient immunity (CMTI) of 40 kV/µs. Operating on a supply voltage range of 3 V to 5.5 V, it exhibits propagation delays of 18 ns and rise/fall times of 2.5 ns. The component operates within a temperature range of -40°C to +125°C and is housed in a 20-SOIC package.

Feature Summary

• Integrates capacitive coupling technology for high-speed signal isolation across multiple channels
• Provides robust electromagnetic interference rejection through specified common-mode transient immunity ratings
• Supports wide operating voltage ranges suitable for various logic interface requirements

Applications

• Industrial automation control systems requiring galvanic isolation
• Power electronics monitoring and gate drive interfaces
• Medical equipment signal transmission with safety isolation needs

Procurement Notes

Verify the specific suffix 'IS' against official Skyworks documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with 20-SOIC footprint requirements during PCB layout. Confirm that the 5000 Vrms isolation rating meets system safety standards. Check for AEC-Q100 qualification if automotive applications are intended, as this may vary by sub-part number.

Selection Notes

Select this component when high channel density and fast switching speeds are required in a single package. The integrated DC-DC converter option reduces external component count compared to discrete isolators. Consider the 20-SOIC package size for space-constrained designs. Evaluate the 40 kV/µs CMTI for noisy industrial environments where signal integrity is critical.

Part Context

This part belongs to the Si8844x series of digital isolators from Skyworks Solutions. The series is designed for applications demanding high reliability and speed. The BC variant typically denotes specific isolation voltage and channel configurations within the broader product family. It serves as a modern replacement for older optocoupler technologies in high-performance digital interfaces.

Replacement Considerations

SI88443BD-ISR is listed as a similar alternative in distributor databases, though availability may vary. Verify pinout compatibility and electrical parameter equivalence before substitution. Ensure the replacement maintains the required 5000 Vrms isolation level.