SI88644EC-IS

Overview

The SI88644EC-IS is a four-channel unidirectional digital isolator from Skyworks Solutions, housed in a 24-pin SOIC package. It operates on a 3 V to 5.5 V supply and supports data rates up to 100 Mb/s with a propagation delay of 18 ns. The device provides 5000 Vrms insulation voltage and features a common-mode transient immunity of 40 kV/µs. It functions within an operating temperature range of -40 °C to +125 °C.

Feature Summary

• Integrates four independent unidirectional signal channels for high-density isolation applications.
• Utilizes capacitive coupling technology to ensure robust signal transmission across the isolation barrier.
• Includes an integrated DC-DC converter to provide isolated power supplies for both sides of the circuit.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment signal interfaces
• Automotive electronic control units

Procurement Notes

Verify the specific suffix against official Skyworks documentation to confirm pinout and electrical characteristics. Ensure the selected variant matches the required insulation voltage and channel configuration for your design. Check current availability status as distribution may vary by region.

Selection Notes

Select this component when four isolated bidirectional or unidirectional paths are needed with integrated power conversion. Compare propagation delay and CMTI specifications against system timing requirements. Confirm that the SOIC-24 package dimensions fit the target PCB layout constraints.

Part Context

This part belongs to the Si8864x family of digital isolators designed for general-purpose applications. It combines signal isolation with power delivery in a single compact package, reducing board space compared to discrete solutions.

Replacement Considerations

Consult official Skyworks substitution guides for verified alternatives. Cross-reference pinouts and electrical ratings before replacing existing components in production designs.