SI88621ED-ISR

Overview

The SI88621ED-ISR is a Skyworks digital isolator featuring two channels with an integrated DC-DC converter. It operates within a 3 V to 5.5 V supply range and supports data rates up to 100 Mb/s. The device provides 5000 Vrms insulation voltage and exhibits a propagation delay of 18 ns. It functions across a temperature range of -40°C to +125°C, drawing 8 mA of operating current. The component 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 galvanic isolation between circuits at different voltage levels
• Supports bidirectional signal transmission with one forward and one reverse channel

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing safe patient isolation barriers
• Power electronics interfaces for motor control applications

Procurement Notes

Verify the specific suffix 'ED' confirms the inclusion of the integrated DC-DC converter, as variants without this suffix may lack power conversion capabilities. Ensure the 'ISR' suffix matches the required tape and reel packaging format for automated assembly processes. Confirm that the 20-SOIC footprint aligns with the target PCB design constraints before finalizing procurement orders.

Selection Notes

Select this model when both signal isolation and isolated power delivery are required in a single package. It is suitable for designs needing high common-mode transient immunity and wide operating temperature ranges. Consider alternative parts if only signal isolation without power conversion is needed, or if a smaller package size is mandatory for space-constrained applications.

Part Context

This component belongs to the Si8862x series of general-purpose digital isolators from Skyworks Solutions. The series is designed for industrial and automotive applications requiring reliable data transmission across isolation barriers. The ED variant specifically distinguishes itself by incorporating an on-chip DC-DC converter, simplifying system architecture compared to standard isolators.

Replacement Considerations

SI88621BC-ISR is a documented substitute part number within the same product family.