SI83408ADA-IFR

Overview

The SI83408ADA-IFR is a four-channel isolated smart switch IC designed for power distribution applications. It features four sourcing outputs with SPI input and channel status indicators. The device supports an operating supply voltage range of 2.25 V to 32 V. Key electrical parameters include a maximum on-resistance of 280 mΩ, a continuous output current of 700 mA, and a current limit of 880 mA. It operates within a temperature range of -40°C to +125°C and is housed in a 32-DFN (9x9) package.

Feature Summary

• Provides four independent high-side switching channels with integrated isolation.
• Includes serial peripheral interface (SPI) control for configuration and monitoring.
• Offers real-time channel status indicators for diagnostic feedback.
• Integrates overcurrent protection with defined current limiting thresholds.

Applications

• Industrial automation power distribution systems
• Automotive electronic control unit load switching
• Telecommunications infrastructure power management
• Renewable energy system component isolation

Procurement Notes

Verify the specific suffix IFR against the manufacturer's official datasheet to confirm tape-and-reel packaging specifications. Ensure the ordering part number matches the required quantity per reel. Confirm RoHS compliance status through the latest product compliance documentation provided by Skyworks Solutions Inc. prior to final procurement decisions.

Selection Notes

Select this component when four isolated high-side switches are required with digital SPI control. The 700 mA output current and 280 mΩ on-resistance suit moderate load applications. Verify that the 32-DFN package footprint fits the PCB layout constraints. Ensure the system voltage remains within the 2.25 V to 32 V operational range for reliable performance.

Part Context

This device belongs to the SI8340x family of isolated smart switches from Skyworks Solutions Inc. These components integrate power switching, isolation, and control logic into a single package. The family typically offers varying channel counts and current ratings to address diverse power distribution needs in industrial and automotive environments.

Replacement Considerations

Consult the Skyworks Solutions Inc. official substitution guide for verified alternatives. Cross-reference pin compatibility and electrical parameters before replacing. Generic equivalents may lack the specific SPI interface or isolation characteristics required for this application.