SI88443BC-ISR

Overview

The SI88443BC-ISR is a general-purpose digital isolator from the Si88443 series manufactured by Skyworks Solutions. It features four unidirectional channels with capacitive coupling technology, supporting data rates up to 100 Mb/s. The device provides an insulation voltage of 5000 Vrms and operates within a supply voltage range of 3 V to 5.5 V. It exhibits a common-mode transient immunity of 40 kV/µs and functions across a temperature range of -40°C to +125°C. Packaged in a 20-SOIC format, it is designed for robust signal isolation in industrial applications.

Feature Summary

• Integrates four independent unidirectional signal paths for comprehensive channel isolation
• Utilizes silicon dioxide-based capacitive coupling for high reliability and low power consumption
• Provides enhanced safety standards compliance through high insulation voltage ratings
• Features high common-mode transient immunity to maintain signal integrity in noisy environments

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced electrical safety barriers
• Power metering circuits for accurate signal transmission
• Inverter drives and motor control interfaces

Procurement Notes

Verify the specific suffix BC against official Skyworks documentation to confirm insulation voltage and package dimensions. Ensure compatibility with moisture sensitivity levels during storage and reflow soldering processes. Confirm that the 20-SOIC footprint matches your PCB layout requirements before finalizing procurement decisions.

Selection Notes

Select this component when four isolated channels are required without integrated DC-DC conversion capabilities. Compare against the SI88443ED-ISR if higher insulation voltage or bidirectional functionality is needed. Consider the SI88440BC-ISR for alternative pinout configurations within the same family while maintaining similar performance characteristics.

Part Context

This part belongs to the Si8844x family of digital isolators, which leverages Skyworks' proprietary CMOS process. The family offers various channel counts and isolation voltages. The SI88443BC-ISR specifically targets applications needing four channels with standard unidirectional signal flow and high-speed data transmission capabilities.

Replacement Considerations

SI88443BD-ISR is listed as a substitute but carries an NRND status. Verify functional equivalence regarding pinout and electrical parameters before adoption.