SI88240ED-ISR

Overview

The SI88240ED-ISR is a high-speed digital isolator from Skyworks Solutions, featuring four unidirectional channels and an integrated DC-DC converter. It provides 5000 Vrms isolation via capacitive coupling technology. The device supports data rates up to 100 Mb/s with a propagation delay of 18 ns. Operating voltage ranges from 3 V to 5.5 V. It is housed in a SOIC-Wide-20 package and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a 2W DC-DC converter for isolated power supply generation
• Provides robust capacitive coupling isolation for noise immunity
• Supports high-speed signal transmission at 100 Mb/s

Applications

• Industrial automation systems requiring galvanic isolation
• Inverter and motor drive control circuits
• Programmable logic controller (PLC) input/output modules

Procurement Notes

Verify the specific suffix 'ED-ISR' against official Skyworks documentation to confirm the tape-and-reel packaging configuration and extended temperature rating. Ensure compatibility with existing PCB footprints for the SOIC-Wide-20 package. Cross-reference the datasheet revision date to validate current electrical specifications before procurement.

Selection Notes

Select this component when a single-chip solution combining isolation and power conversion is required. It eliminates the need for external isolated power supplies, reducing board space and component count. Suitable for designs needing high common-mode transient immunity and bidirectional or unidirectional data flow across the isolation barrier.

Part Context

This part belongs to the Si88xx ISOvolt family of digital isolators. These devices are designed to replace traditional optocouplers, offering superior performance in speed, size, and power consumption. The series integrates CMOS technology to provide reliable isolation for industrial and automotive applications.

Replacement Considerations

Check Skyworks documentation for direct pin-compatible alternatives within the Si8824x series. Verify if lower channel counts or different isolation voltages meet system requirements. Confirm that any substitute maintains the same DC-DC converter output capabilities.