SI88442BD-ISR

Overview

The SI88442BD-ISR is a general-purpose digital isolator from Skyworks Solutions, featuring four unidirectional channels with an integrated DC-DC converter. It utilizes capacitive coupling technology to provide 5000 Vrms isolation voltage and supports data rates up to 100 Mb/s. The device operates within a supply voltage range of 3 V to 5.5 V and offers a propagation delay of 18 ns. It is housed in a 20-SOIC package and functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency isolated DC-DC converter for power delivery across the isolation barrier
• Provides robust signal isolation via capacitive coupling technology
• Supports high-speed data transmission with low propagation delay

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing high-voltage safety compliance
• Power electronics interfaces such as motor drives and inverters

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package and thermal specifications. Check current lifecycle status, as this part may be restricted for new designs. Ensure proper handling procedures are followed due to moisture sensitivity classification.

Selection Notes

Evaluate the need for an integrated power source versus external isolation supplies. Consider channel count requirements against available alternatives like the SI88421 series. Assess thermal management needs given the power dissipation characteristics. Verify compatibility with system voltage levels and signal integrity requirements.

Part Context

This component belongs to the Si884xx family of digital isolators designed for high-reliability applications. It combines signal isolation with power conversion in a single package, reducing board space and component count compared to discrete solutions. The family emphasizes noise immunity and long-term stability for demanding environments.

Replacement Considerations

Public confirmed substitute part numbers include SI88442BC-ISR.