SI88422BD-IS

Overview

The SI88422BD-IS is a two-channel digital isolator from Skyworks Solutions, featuring an integrated DC-DC converter for secondary-side power generation. It operates on a single supply voltage ranging from 3 V to 5.5 V and supports data rates up to 100 Mb/s. The device provides 5000 Vrms isolation voltage with a common-mode transient immunity of 40 kV/µs. Key electrical parameters include a maximum propagation delay of 18 ns, rise and fall times of 2.5 ns, and a typical operating supply current of 7.5 mA. It functions within a temperature range of -40°C to +125°C and is housed in a 16-SOIC package.

Feature Summary

• Integrates a fully-controlled DC-DC converter for isolated power delivery
• Provides high-speed bidirectional signal isolation
• Offers robust common-mode transient immunity

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment with safety isolation requirements
• Power electronics control circuits

Procurement Notes

Verify the specific suffix (AS vs ISR) against your bill of materials, as packaging formats differ. Confirm availability status directly with authorized distributors, as lead times may vary. Ensure the selected variant matches the required thermal and electrical specifications for your design environment.

Selection Notes

Select this component when integrated isolated power is required to simplify board layout and reduce external component count. Compare channel count and data rate requirements against other Si884xx series variants. Verify that the 16-SOIC footprint fits your PCB constraints and that the 5000 Vrms isolation rating meets system safety standards.

Part Context

This part belongs to the Si8842x family of high-speed digital isolators with integrated power supplies. It replaces discrete isolation solutions by combining signal channels and a DC-DC converter in a single package. The family targets applications needing reliable data transmission across isolation barriers without external magnetic components.

Replacement Considerations

Check for direct pin-compatible upgrades within the Si884xx series. Verify if alternative packages or suffixes offer identical functionality with different shipping formats.