SI88421BD-ISR

Digital Isolators Overview

The SI88421BD-ISR is a Skyworks Solutions digital isolator featuring two channels with integrated DC-DC converter capability. 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 timing parameters include a propagation delay of 18 ns, rise/fall times of 2.5 ns, and pulse width distortion of 7 ns. It functions reliably between -40°C and +125°C in a 16-SOIC wide package.

Digital Isolators Feature Summary

• Integrates dual-channel digital isolation with internal power conversion support
• Provides high common-mode transient immunity for signal integrity
• Ensures fail-safe output states under fault conditions

Digital Isolators Applications

• Industrial automation control systems
• Power supply feedback loops
• General-purpose isolated communication interfaces

Digital Isolators Procurement Notes

Verify the NRND (Not Recommended for New Designs) status before finalizing procurement plans. Confirm that the 16-SOIC-W package dimensions match the target PCB footprint. Ensure input signals comply with the specified voltage levels and data rate limits to maintain performance within the -40°C to +125°C operating range.

Digital Isolators Selection Notes

Select this component when a combination of bidirectional or unidirectional isolation and integrated power management is required. The 100 Mb/s data rate suits moderate-speed applications. Consider the 5000 Vrms isolation rating for safety compliance. Evaluate the 18 ns propagation delay against system timing requirements.

Digital Isolators Part Context

This part belongs to the Si88421 series of digital isolators from Skyworks Solutions. It shares architectural similarities with other members like the SI88420BD-ISR but differs in specific channel configurations or integration levels. The series utilizes proprietary capacitive coupling technology for robust signal transmission across isolation barriers.

Digital Isolators Replacement Considerations

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