SI88640BC-ISR

Overview

The SI88640BC-ISR is a Skyworks Solutions digital isolator featuring four unidirectional channels with an integrated DC-DC converter. It operates at a data rate of 100 Mb/s and provides 3750 Vrms isolation voltage via capacitive coupling. The device utilizes a 24-SOIC package for surface mount installation. Key electrical specifications include a maximum power supply voltage of 5.5 V, a minimum of 3 V, and a propagation delay of 18 ns. It supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Integrates a 2W DC-DC converter within the digital isolator package
• Provides high common-mode transient immunity for reliable signal transmission
• Supports bidirectional or unidirectional data flow configurations

Applications

• Industrial automation systems requiring galvanic isolation
• Programmable logic controller (PLC) input/output modules
• Medical equipment with safety isolation requirements

Procurement Notes

Verify the specific suffix 'ISR' confirms the reel packaging format and channel configuration. Ensure the 3750 Vrms isolation rating meets your system's safety standards. Confirm the 24-SOIC footprint matches your PCB layout constraints. Check RoHS compliance status if required by your manufacturing process. Validate the operating temperature range against your environmental conditions.

Selection Notes

Select this component when a compact solution combining isolation and power conversion is needed. The four-channel design reduces board space compared to discrete components. Consider the 100 Mb/s speed for moderate data throughput applications. Evaluate the thermal performance of the SOIC package under load. Compare integration benefits against separate isolator and converter designs.

Part Context

This part belongs to the Si88xx ISOvolt family, which integrates digital isolation with on-chip power management. It replaces traditional optocoupler solutions in industrial and medical applications. The CMOS technology offers lower power consumption and higher reliability than legacy technologies.

Replacement Considerations

Check Skyworks documentation for direct pin-compatible alternatives within the Si8864x series. Verify that substitute parts maintain the same 3750 Vrms isolation rating and 24-SOIC package dimensions. Ensure the replacement supports the required 100 Mb/s data rate and unidirectional channel configuration.