SI88420ED-IS

Digital Isolators Overview

The SI88420ED-IS is a general-purpose digital isolator from Skyworks Solutions, featuring two unidirectional channels with a data rate of 100 Mb/s. It operates on a supply voltage range of 3 V to 5.5 V and provides 5000 Vrms isolation via capacitive coupling technology. The device includes an integrated DC-DC converter for isolated power generation. Key electrical parameters include a propagation delay of 18 ns, rise/fall times of 2.5 ns, and a common-mode transient immunity of 40 kV/µs. It functions within a temperature range of -40°C to +125°C and is housed in a 16-pin SOIC-Wide package.

Digital Isolators Feature Summary

• Integrates a high-efficiency DC-DC converter to provide isolated power supply capability
• Utilizes silicon dioxide (SiO2) capacitive coupling technology for robust signal transmission
• Provides galvanic isolation between circuits operating at different voltage levels

Digital Isolators Applications

• Industrial automation systems requiring reliable signal isolation
• Medical equipment needing high-voltage isolation safety
• Power metering applications with isolated communication interfaces

Digital Isolators Procurement Notes

Verify the specific suffix 'ISR' indicates tape-and-reel packaging when ordering. Confirm the component status as Not Recommended for New Designs (NRND) to assess long-term availability risks. Ensure compatibility with existing PCB footprints for the 16-SOIC wide package. Check for AEC-Q100 qualification if automotive grade reliability is required for the application environment.

Digital Isolators Selection Notes

Select this component for designs requiring integrated isolated power alongside signal isolation in a compact form factor. The unidirectional channel configuration suits applications where data flows in one direction across the isolation barrier. Consider the 100 Mb/s data rate limit when designing for high-speed communication protocols. Evaluate the thermal performance given the power dissipation characteristics of the integrated converter.

Digital Isolators Part Context

This part belongs to the Si88420 series of digital isolators, which are designed for general-purpose applications. The series emphasizes high reliability and low power consumption. The SI88420ED-IS specifically combines isolation barriers with power conversion, reducing the need for external isolated power supplies in complex system architectures.

Digital Isolators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the NRND status, alternative components should be evaluated based on pin compatibility and isolation voltage ratings.