SI88640BD-ISR

Overview

The SI88640BD-ISR is a Skyworks Solutions digital isolator featuring four unidirectional channels and an integrated DC-DC converter. It operates within a 3 V to 5.5 V supply range, delivering a data rate of 100 Mb/s with a propagation delay of 18 ns. The device provides 5000 Vrms isolation via capacitive coupling and functions between -40 °C and +125 °C. Packaged in a SOIC-20, it supports general-purpose applications requiring high-speed signal transmission across isolated boundaries.

Feature Summary

• Integrates a high-voltage DC-DC converter for power delivery across the isolation barrier
• Utilizes silicon dioxide-based capacitive coupling technology for robust signal transmission
• Features a shutdown pin for active power management and reduced standby consumption

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment with strict safety isolation standards
• Power electronics and motor control circuits
• Data acquisition systems with mixed-signal environments

Procurement Notes

Verify component status as Not Recommended for New Designs (NRND). Confirm RoHS3 compliance and lead-free status through official documentation. Ensure compatibility with existing PCB footprints and thermal requirements before finalizing procurement plans.

Selection Notes

Select this part for applications needing four-channel isolation combined with onboard power conversion. Evaluate the 100 Mb/s speed against system timing constraints. Consider the SOIC-20 package dimensions for layout space. Verify that the 5000 Vrms rating meets specific safety regulatory requirements for the target environment.

Part Context

This component belongs to the Si88xxx series of digital isolators from Skyworks Solutions. It combines signal isolation with power conversion capabilities, distinguishing it from standard isolator-only devices. The series targets high-reliability industrial and medical markets where compact, integrated solutions are preferred over discrete transformer or optocoupler designs.

Replacement Considerations

Check Skyworks official substitution lists for direct replacements. Verify pinout compatibility and electrical parameter alignment if considering alternative channel counts or voltage ratings.