SI88442BC-IS

Overview

The SI88442BC-IS is a Skyworks Solutions digital isolator featuring four unidirectional channels and an integrated DC-DC converter. It provides 5000 Vrms isolation via capacitive coupling, supporting data rates up to 100 Mb/s with a propagation delay of 18 ns. The device operates on a supply voltage range of 3 V to 5.5 V, with a typical operating current of 10.8 mA. It includes two forward and two reverse channels, housed in a SOIC-20 package suitable for surface mount applications across temperatures from -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency DC-DC converter to power the isolated secondary side without external components
• Provides robust signal isolation through capacitive coupling technology rated at 5000 Vrms
• Supports high-speed data transmission with a maximum rate of 100 Mb/s per channel

Applications

• Industrial automation systems requiring galvanic isolation between control and field devices
• Power electronics interfaces such as motor drives and inverter gate drivers
• Medical equipment needing safety-compliant isolation between patient-contact circuits and processing units

Procurement Notes

Verify the specific suffix 'IS' corresponds to the tape-and-reel packaging format when sourcing, as this differs from tube-packaged variants like 'AS'. Confirm that the 5000 Vrms insulation rating aligns with your system's safety requirements. Ensure the integrated DC-DC converter output matches the load requirements of the isolated side. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Choose this component when both high-density signal isolation and integrated power delivery are required in a single package. The unidirectional configuration suits applications where data flows strictly from primary to secondary or vice versa. Consider the 18 ns propagation delay for timing-sensitive designs. Evaluate the SOIC-20 footprint against available PCB space compared to wider packages used by other series members.

Part Context

This part belongs to the Si8844x family of digital isolators with integrated converters. It complements similar models like the SI88442EC-ISR and SI88442BC-AS, differing primarily in packaging type and specific insulation ratings. The family targets general-purpose isolation needs in industrial and automotive sectors, offering a balance of performance and integration density.

Replacement Considerations

The SI88442EC-ISR serves as a direct functional substitute within the same series, sharing identical electrical characteristics and pinout. Both parts offer 100 Mb/s data rates and 4-channel unidirectional isolation. Verify that the replacement variant meets the specific insulation voltage requirements of the target application.