SI88642ED-IS

Overview

The SI88642ED-IS is a Skyworks digital isolator featuring four isolated channels with unidirectional signal transmission. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 100 Mb/s. The device provides an isolation voltage of 5000 Vrms using capacitive coupling technology. Key electrical parameters include a maximum propagation delay of 18 ns, rise/fall times of 2.5 ns, and a common-mode transient immunity of 40 kV/µs. It functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Integrates four independent unidirectional digital isolation channels for general-purpose signal transmission.
• Utilizes capacitive coupling technology to achieve high isolation voltage ratings without magnetic components.
• Includes integrated DC-DC converter capability for isolated power generation in specific configurations.

Applications

• Industrial automation systems requiring robust signal isolation.
• Medical equipment needing high-voltage safety compliance.
• Power electronics interfaces for motor control and inverters.

Procurement Notes

Verify the component status as Not Recommended for New Designs (NRND) before finalizing procurement plans. Confirm that the SOIC-Wide-24 package matches the target PCB footprint requirements. Ensure that the moisture sensitivity level and reflow soldering profiles align with assembly capabilities. Cross-reference the manufacturer part number against official Skyworks documentation to avoid counterfeit or obsolete stock issues.

Selection Notes

Select this component when four unidirectional channels are required alongside integrated power conversion capabilities. The 100 Mb/s data rate suits moderate-speed digital communication needs. Consider the 24-pin wide SOIC package for thermal dissipation and layout flexibility. Evaluate the 40 kV/µs CMTI rating against noise environments typical in industrial applications.

Part Context

This device belongs to the Si8864x series of digital isolators from Skyworks Solutions. It combines signal isolation with an on-chip DC-DC converter, reducing external component count compared to standard isolators. The series targets applications demanding high reliability and compact form factors in harsh electrical environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.