SI88343BD-ISR

Digital Isolators Overview

The SI88343BD-ISR is a high-speed digital isolator from Skyworks Solutions, featuring four unidirectional channels with an integrated DC-DC converter. It utilizes capacitive coupling technology to provide robust signal isolation in harsh environments. The device supports data rates up to 100 Mb/s and offers an insulation voltage of 5000 Vrms. Operating on a supply voltage range of 3 V to 5.5 V, it ensures reliable performance across temperatures from -40°C to +125°C. Packaged in a 24-SOIC (0.295", 7.50mm Width) surface-mount format, this component integrates power conversion capabilities within the isolation barrier.

Digital Isolators Feature Summary

• Integrates a 2W DC-DC converter for isolated power generation
• Provides high common-mode transient immunity for noise rejection
• Supports general-purpose digital signal transmission

Digital Isolators Applications

• Industrial automation systems
• Programmable logic controllers (PLCs)
• Inverter and motor drive circuits

Digital Isolators Procurement Notes

Verify the specific suffix 'ISR' indicates reel packaging configuration distinct from tube variants. Confirm AEC-Q100 qualification status if automotive application is required, as standard datasheets may not explicitly guarantee this for all sub-types. Check current lifecycle status, as some Skyworks isolators are marked NRND. Ensure ESD protection measures are implemented during handling due to moisture sensitivity classification.

Digital Isolators Selection Notes

Select this component when bidirectional isolation is not required, as it is strictly unidirectional. The integrated DC-DC converter simplifies design by eliminating external isolated power supplies. Compare channel count against alternatives like the SI88443 if reverse channels are needed. Verify that the 100 Mb/s data rate meets system timing requirements. Ensure the SOIC-24 package footprint aligns with PCB layout constraints.

Digital Isolators Part Context

This part belongs to the Si88xx ISOvolt family, designed to replace optocouplers in industrial applications. It combines digital isolation with power conversion in a single package. The series targets cost reduction and size minimization compared to traditional discrete solutions. Skyworks positions these devices for high-reliability environments requiring robust galvanic separation between control and power stages.

Digital Isolators Replacement Considerations

Public confirmed substitute part numbers: SI88343BD-IS.