SI88643ED-ISR

Overview

The SI88643ED-ISR is a general-purpose digital isolator from Skyworks Solutions, featuring four unidirectional channels with an integrated DC-DC converter. It provides 5000 Vrms isolation via capacitive coupling and supports data rates up to 100 Mb/s. The device operates on a supply voltage of 3 V to 5.5 V, with a propagation delay of 18 ns. It is housed in a 24-SOIC package and qualified under AEC-Q100 standards for automotive applications.

Feature Summary

• Integrates a high-efficiency DC-DC converter for isolated power delivery
• Provides robust 5000 Vrms insulation barrier using capacitive technology
• Supports high-speed data transmission at 100 Mb/s per channel

Applications

• Automotive electronics systems requiring AEC-Q100 qualification
• Industrial automation and control circuits
• Medical equipment needing galvanic isolation
• Power supply monitoring and feedback loops

Procurement Notes

Verify the specific suffix 'ISR' confirms the tape-and-reel packaging format rather than tube packaging. Confirm that the component status remains active or acceptable for your design lifecycle, as some variants may carry end-of-life notices. Ensure the 24-SOIC footprint matches your PCB layout requirements before finalizing procurement orders.

Selection Notes

Select this model when four independent signal paths are required alongside integrated isolated power generation. The unidirectional channel configuration suits applications where data flows strictly from source to destination. Consider the 18 ns propagation delay and 100 Mb/s speed for timing-sensitive digital communication interfaces within isolated domains.

Part Context

This component belongs to the Si886xx family of digital isolators, which combines signal isolation with power conversion capabilities. The series is designed to replace traditional optocouplers in modern electronic designs, offering higher reliability and smaller form factors. The SI88643 variant specifically addresses multi-channel isolation needs in compact packages.

Replacement Considerations

Public confirmed substitute part numbers: SI88643ED-IS (tube packaging), SI88643ED-IBS (lead-free variant). Verify pinout compatibility and thermal characteristics when transitioning between these specific SKUs.