SI88621BD-ISR

Overview

The SI88621BD-ISR is a high-performance digital isolator from Skyworks Solutions, featuring an integrated DC-DC converter. It provides two unidirectional channels with a data rate of 100 Mb/s and a propagation delay of 18 ns. The device offers 5000 Vrms isolation voltage and supports a supply voltage range of 3 V to 5.5 V. Operating temperatures span from -40°C to +125°C. It utilizes capacitive coupling technology and is housed in a 20-SOIC package.

Feature Summary

• Integrates a high-efficiency DC-DC converter for isolated power generation
• Provides robust 5000 Vrms insulation via capacitive coupling
• Supports high-speed data transmission at 100 Mb/s

Applications

• Industrial automation systems requiring galvanic isolation
• Power electronics gate driving applications
• Medical equipment signal isolation

Procurement Notes

Verify the specific suffix 'BD' indicates the 5kV rating and integrated DC-DC functionality distinct from other variants. Confirm the 'ISR' suffix corresponds to the reel packaging format. Ensure compatibility with AEC-Q100 automotive qualification if required for the target application environment.

Selection Notes

Select this component when both high-voltage isolation and integrated power conversion are necessary within a single package. The 20-SOIC footprint accommodates wide-body layouts suitable for high creepage distances. Consider the 100 Mb/s speed limit against system requirements before choosing over higher-speed alternatives.

Part Context

This part belongs to the Si88x2x family of digital isolators designed for general-purpose isolation. It combines signal isolation with power delivery, reducing external component count. The series is widely used in industrial interfaces where space and efficiency are critical constraints.

Replacement Considerations

SI88621BC-ISR serves as a verified substitute within the same manufacturer lineup, offering similar functional characteristics.