SI88444ED-ASR

Overview

The SI88444ED-ASR is a Skyworks digital isolator featuring four reverse channels and zero forward channels, housed in a 20-SOIC package. It operates on a 3 V to 5.5 V supply with a data rate of 100 Mb/s and isolation voltage of 5000 Vrms. Key electrical parameters include an 18 ns propagation delay, 2.5 ns rise/fall times, and 4.5 ns pulse width distortion. The device supports capacitive coupling technology and includes a shutdown function.

Feature Summary

• Provides unidirectional signal isolation across four reverse channels
• Integrates a shutdown control pin for power management
• Utilizes capacitive coupling technology for high-speed data transmission

Applications

• Industrial automation systems requiring galvanic isolation
• Power electronics monitoring circuits
• General-purpose digital communication interfaces

Procurement Notes

Verify the specific suffix 'ASR' against official Skyworks documentation to confirm package dimensions and tape-and-reel specifications. Confirm RoHS compliance status through current datasheets. Check the lifecycle status as NRND (Not Recommended for New Designs) before finalizing procurement plans to ensure long-term availability.

Selection Notes

Select this component when unidirectional isolation with four output channels is required. Ensure the application voltage range fits within 3 V to 5.5 V limits. Verify that the 100 Mb/s data rate meets system timing requirements. Consider the 20-SOIC footprint constraints during PCB layout design.

Part Context

This part belongs to the Si8844x series of CMOS digital isolators from Skyworks Solutions. These devices are designed for robust noise immunity and high common-mode transient immunity. The series typically offers integrated dc-dc converter options in other variants, though this specific configuration focuses on channel count and directionality.

Replacement Considerations

Consult official Skyworks substitution guides for verified alternatives. Cross-reference pinout compatibility and electrical specifications carefully. No direct substitute part numbers are confirmed in public documentation.