SI88443EC-IS

Overview

The SI88443EC-IS is a high-performance digital isolator manufactured by Skyworks Solutions, Inc., featuring an integrated DC-DC converter. It provides four unidirectional signal channels with a data rate of 100 Mb/s and a propagation delay of 18 ns. The device offers 5000 Vrms isolation voltage and supports a supply voltage range of 3 V to 5.5 V. It operates within a temperature range of -40°C to +125°C and utilizes capacitive coupling technology. The component is housed in a 20-SOIC package.

Feature Summary

• Integrates a high-efficiency DC-DC converter for isolated power generation
• Provides robust 5000 Vrms insulation barrier via capacitive coupling
• Supports high-speed data transmission at 100 Mb/s per channel

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing high-voltage safety barriers
• Power electronics control circuits
• Smart grid infrastructure communication interfaces

Procurement Notes

Verify the specific suffix 'IS' corresponds to the required tape-and-reel packaging configuration rather than tube packaging. Confirm that the integrated DC-DC converter meets the target application's power requirements. Ensure compatibility with the 20-SOIC footprint during PCB layout. Check for AEC-Q100 qualification if automotive usage is intended, as this variant may differ from standard industrial versions.

Selection Notes

Select this component when a single solution is needed for both signal isolation and isolated power delivery. It is suitable for designs prioritizing board space reduction by eliminating external isolated power supplies. Consider the 100 Mb/s data rate limit for high-speed interface requirements. Evaluate the thermal performance given the integrated converter's power dissipation characteristics in enclosed environments.

Part Context

This part belongs to the Si884xx family of digital isolators from Skyworks Solutions. These devices are designed to replace traditional optocouplers in modern applications. The family emphasizes high reliability and long-term stability. The SI88443EC-IS specifically targets applications requiring multiple isolated channels with integrated power conversion capabilities.

Replacement Considerations

Direct replacements include other variants within the Si88443 series such as SI88443BD-IS or SI88443EC-AS, provided pinout and electrical specifications match. Verify that substitute parts maintain the same 5000 Vrms isolation rating and 100 Mb/s data rate. Ensure the replacement supports the required unidirectional channel configuration.