SI88644ED-IS

Overview

The SI88644ED-IS is a quad digital isolator from Skyworks Solutions, featuring an integrated secondary-sensing feedback-controlled DC-DC converter. It provides four independent channels with unidirectional signal transmission at data rates up to 100 Mbps. The device offers high isolation voltage of 5000 Vrms and common-mode transient immunity of 40 kV/µs. Operating on supply voltages between 3 V and 5.5 V, it ensures reliable performance across industrial temperature ranges from -40°C to +125°C.

Feature Summary

• Integrated secondary-sensing feedback-controlled DC-DC converter for isolated power generation
• High-speed capacitive coupling technology supporting 100 Mbps data rates
• Robust insulation capabilities with 5000 Vrms isolation voltage rating

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing high-voltage safety barriers
• Power electronics control circuits with isolated gate drives

Procurement Notes

Verify the specific package variant (SOIC-Wide-24) against design requirements. Confirm that the integrated DC-DC converter meets the target load current specifications. Ensure compatibility with the required operating voltage range of 3 V to 5.5 V. Check for any obsolescence notices or lifecycle status updates from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a fully integrated isolated power solution is required alongside signal isolation. The built-in DC-DC converter eliminates the need for external magnetic components. Consider the 24-pin SOIC package for PCB space constraints. Verify that the 100 Mbps speed suffices for the application's communication needs.

Part Context

This part belongs to the Si88x4x family of quad digital isolators. It distinguishes itself by incorporating an on-chip DC-DC converter, simplifying system design compared to standard isolators. The series is designed for applications demanding high reliability and compact form factors in harsh electrical environments.

Replacement Considerations

Check for direct substitutes within the Si8864x family. Verify pinout compatibility if considering alternative packages. Ensure the replacement supports the same 5000 Vrms isolation rating and integrated power conversion features.