SI88444BC-IS

Overview

The SI88444BC-IS is a Skyworks Solutions digital isolator featuring four unidirectional channels in a 20-SOIC package. It supports data rates up to 100 Mb/s with a propagation delay of 18 ns and rise/fall times of 2.5 ns. The device offers an insulation voltage of 3750 Vrms and operates within a supply voltage range of 3 V to 5.5 V. It functions reliably between -40°C and +125°C, providing high common-mode transient immunity for robust signal transmission across isolation barriers.

Feature Summary

• Integrates four unidirectional signal paths for efficient multi-channel isolation
• Utilizes capacitive coupling technology for reliable signal transfer
• Supports high-speed data transmission at rates up to 100 Mb/s
• Operates within extended industrial temperature ranges for harsh environments

Applications

• Industrial automation control systems
• Power monitoring and metering equipment
• Medical instrumentation requiring galvanic isolation
• Communication interfaces in noisy electrical environments

Procurement Notes

Verify the specific suffix 'IS' corresponds to the SOIC-20 tube packaging configuration rather than reel variants. Confirm that the 3750 Vrms insulation rating meets your system's safety requirements. Ensure compatibility with standard surface-mount assembly processes given the SMD/SMT mounting style. Check for any moisture sensitivity level restrictions during storage and handling procedures.

Selection Notes

Select this component when four isolated bidirectional or unidirectional channels are required in a compact footprint. Compare against similar series parts like the SI88443 if integrated DC-DC conversion is not needed. Consider the 18 ns propagation delay for timing-critical applications. Evaluate the 20-SOIC package dimensions against available PCB space constraints.

Part Context

This part belongs to the Si88444 series of general-purpose digital isolators from Skyworks Solutions. It complements other variants such as the SI88444BC-AS which may differ in packaging or thermal characteristics. The series is designed to replace optocouplers in modern designs, offering higher reliability and lower power consumption while maintaining signal integrity across isolation boundaries.

Replacement Considerations

Public confirmed substitute part numbers: None identified.