SI88440BD-ISR

Digital Isolators Overview

The SI88440BD-ISR is a high-speed digital isolator featuring four unidirectional channels and an integrated DC-DC converter. It provides 5000 Vrms isolation voltage using capacitive coupling technology. The device supports data rates up to 100 Mb/s with a propagation delay of 18 ns. Operating on a supply voltage range of 3 V to 5.5 V, it functions within temperatures from -40°C to +125°C. Packaged in a SOIC-Wide-20 surface-mount format, this component is designated as NRND (Not Recommended for New Designs) by the manufacturer.

Digital Isolators Feature Summary

• Integrates a high-efficiency DC-DC converter to provide isolated power generation alongside signal transmission.
• Utilizes silicon dioxide-based capacitive coupling for robust isolation performance.
• Features unidirectional signal paths optimized for general-purpose digital isolation applications.

Digital Isolators Applications

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

Digital Isolators Procurement Notes

Verify current availability status as the SI88440BD-ISR carries an NRND lifecycle designation, indicating it is not recommended for new designs. Confirm package variant matches the SOIC-Wide-20 specification. Ensure design-in decisions account for end-of-life implications and potential long-term supply constraints associated with discontinued or phase-out components.

Digital Isolators Selection Notes

Select this component when a 5000 Vrms isolation barrier and integrated power conversion are required in a single package. The 100 Mb/s data rate suits moderate-speed digital interfaces. Consider the NRND status carefully; alternative Skyworks models within the same series may offer better long-term support while maintaining similar electrical characteristics and pin configurations.

Digital Isolators Part Context

This part belongs to the Si88440 family of high-data-rate digital isolators. The family combines signal isolation with integrated DC-DC converters, reducing external component count. The specific suffix indicates the reel packaging option and the wide-body SOIC footprint designed for enhanced creepage distances.

Digital Isolators Replacement Considerations

Public confirmed substitute part numbers: SI88440BC-ISR, SI88440ED-ISR, SI88440EC-IS.