SI88443BD-IS

Overview

The SI88443BD-IS is a high-data-rate digital isolator from Skyworks Solutions, featuring four unidirectional channels and an integrated DC-DC converter. It utilizes capacitive coupling technology to provide robust isolation with a rated insulation voltage of 5000 Vrms. The device supports data rates up to 100 Mb/s with a maximum propagation delay of 18 ns. It operates on supply voltages between 3 V and 5.5 V and functions within a temperature range of -40°C to +125°C. Packaged in a 20-SOIC format, it includes a shutdown feature for power management.

Feature Summary

• Integrates a high-efficiency DC-DC converter to generate isolated power supplies
• Provides electrical isolation via capacitive coupling technology
• Supports high-speed data transmission at rates up to 100 Mb/s
• Includes a dedicated shutdown pin for active power control

Applications

• Industrial automation systems requiring galvanic isolation
• Power electronics interfaces such as motor drives and inverters
• Medical equipment needing high-voltage safety isolation
• Communication gateways connecting different voltage domains

Procurement Notes

Verify the specific suffix configuration against current Skyworks documentation, as the SI88443BD-IS may be designated as Not Recommended for New Designs (NRND). Confirm availability through authorized distributors and check for lifecycle status updates before finalizing procurement plans to ensure long-term supply stability.

Selection Notes

Select this component when high channel count and integrated isolated power are required in a single package. Ensure the 5000 Vrms isolation rating meets system safety standards. Verify that the 20-SOIC footprint aligns with PCB layout constraints and that the 100 Mb/s data rate satisfies application timing requirements.

Part Context

This part belongs to the Si884xx series of digital isolators, which combine signal isolation with integrated power conversion. It is designed for applications demanding high reliability and compact form factors. The series is widely used in industrial and automotive sectors where space-saving and high-performance isolation are critical design parameters.

Replacement Considerations

Public confirmed substitute part numbers include SI88443BC-ISR. Verify compatibility regarding insulation voltage ratings and package dimensions before substitution.