SI88240BD-ASR

Overview

The SI88240BD-ASR is an automotive-grade digital isolator featuring four unidirectional channels and an integrated DC-DC converter. It provides 5000 Vrms isolation via capacitive coupling with a data rate of 100 Mb/s. The device operates on a supply voltage range of 3 V to 5.5 V, exhibiting a propagation delay of 18 ns. It utilizes a SOIC-20 surface-mount package and supports pulse width distortion of 7 ns.

Feature Summary

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

Applications

• Automotive inverter gate drive circuits
• Motor control systems requiring galvanic isolation
• High-voltage industrial interface applications

Procurement Notes

Verify the ASR suffix indicates reel packaging configuration. Confirm RoHS compliance status through official Skyworks documentation. Ensure the component meets automotive reliability standards required for your specific design implementation before finalizing procurement.

Selection Notes

Select this part when a single-channel DC-DC converter solution is needed alongside four isolated signal paths. Consider the 18 ns propagation delay and 100 Mb/s speed limits against system timing requirements. Validate that the SOIC-20 footprint fits the target PCB layout constraints.

Part Context

This component belongs to the Si8824x family of digital isolators from Skyworks Solutions. It combines signal isolation with power conversion capabilities, reducing external component count compared to discrete solutions. The automotive grade designation ensures suitability for harsh operating environments.

Replacement Considerations

The SI88240BC-IS offers similar functionality but with lower 3750 Vrms isolation. Verify if the reduced insulation rating meets safety requirements. Check pinout compatibility and thermal performance differences between the BD and BC variants.