SI88643BC-ISR

Overview

The SI88643BC-ISR is a general-purpose digital isolator manufactured by Skyworks Solutions Inc. It features four unidirectional channels with a data rate of 100 Mbps and an insulation voltage of 5000 Vrms. The device utilizes capacitive coupling technology and offers a common mode transient immunity of 40 kV/µs. It operates within a supply voltage range of 3 V to 5.5 V and supports propagation delays of 18 ns and 23 ns. The component is housed in a 24-SOIC package (0.295" width) and functions across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates four independent unidirectional signal paths for multi-channel isolation
• Provides high reliability through capacitive coupling technology
• Includes an integrated isolated DC-DC converter for power delivery
• Ensures robust noise immunity with high common mode transient rejection

Applications

• Industrial automation systems requiring galvanic isolation
• Programmable logic controllers (PLCs)
• Inverter and motor drive circuits
• General purpose digital isolation interfaces

Procurement Notes

Verify the specific suffix 'ISR' to confirm reel packaging and moisture sensitivity level requirements. Ensure the selected variant matches the required channel count and insulation voltage ratings for the target application. Cross-reference the datasheet for pinout compatibility and thermal performance specifications before finalizing procurement decisions.

Selection Notes

Select this component when four isolated channels are required alongside an integrated power converter. The 5000 Vrms rating suits high-voltage industrial environments. Consider the 100 Mbps speed and 40 kV/µs CMTI for noisy applications. Verify that the 24-SOIC footprint fits the PCB layout constraints.

Part Context

This part belongs to the Si88xx ISOvolt family, which combines digital isolation with integrated DC-DC conversion. It serves as a replacement for traditional optocoupler solutions, offering reduced size, lower power consumption, and improved reliability. The series is designed for demanding industrial and automotive applications.

Replacement Considerations

SI88343ED-AS and SI88343ED-ASR are listed as parameter-equivalent substitutes from Skyworks Solutions Inc.