SI88642BC-ISR

Overview

The SI88642BC-ISR is a general-purpose digital isolator featuring four unidirectional channels with an integrated DC-DC converter. It provides 5000 Vrms isolation voltage and supports data rates up to 100 Mb/s. The device operates on a supply voltage range of 3 V to 5.5 V, consuming 10.8 mA of operating power. Key electrical parameters include an 18 ns propagation delay, 2.5 ns rise/fall times, and 10 ns pulse width capability. It utilizes capacitive coupling for signal transmission and is housed in a 24-SOIC package.

Feature Summary

• Integrates a high-efficiency DC-DC converter to provide isolated power supply without external components
• Employs Skyworks' proprietary capacitive coupling technology for robust signal isolation
• Features high common-mode transient immunity (CMTI) for reliable operation in noisy environments

Applications

• Industrial automation systems requiring galvanic isolation
• Power electronics control circuits
• Medical equipment signal interfaces
• Automotive electronic control units

Procurement Notes

Verify the specific suffix 'BC-ISR' against official Skyworks documentation to confirm the 5000 Vrms rating and SOIC-24 package configuration. Ensure compatibility with required thermal management standards for surface mount installation. Cross-reference the manufacturer part number directly with authorized distributors to avoid counterfeit components. Confirm RoHS compliance status through current datasheets before procurement.

Selection Notes

Select this component when high isolation voltage and integrated power conversion are required in a compact form factor. The 4-channel unidirectional configuration suits applications needing separate signal paths. Consider the 100 Mb/s data rate limit for bandwidth requirements. Evaluate the 24-SOIC footprint against PCB layout constraints. Verify that the 3 V to 5.5 V supply range matches system power availability.

Part Context

This device belongs to the Si8864x family of digital isolators from Skyworks Solutions. It is designed for general-purpose applications where space-saving integration of isolation and power management is critical. The series emphasizes reliability through capacitive coupling technology, offering alternatives to traditional transformer-based or optical isolation methods in modern interface IC designs.

Replacement Considerations

Public confirmed substitute part numbers: SI88642EC-ISR, SI88642ED-ISR.