SI8642BB-B-IS1

Overview

The SI8642BB-B-IS1 is a general-purpose digital isolator from the Si864x series, manufactured by Skyworks Solutions Inc. It features four unidirectional channels with capacitive coupling technology. The device operates within a supply voltage range of 2.5 V to 5.5 V and provides an isolation voltage of 2500 Vrms. It supports data rates up to 150 Mbps with a typical propagation delay of 8 ns. The component is housed in a 16-SOIC package and functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Utilizes capacitive coupling for high-speed signal transmission with robust noise immunity
• Provides electrical isolation between input and output sides without requiring isolated power supplies
• Supports bidirectional logic signaling through dedicated forward and reverse channel configurations

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing safe patient isolation
• Power electronics control circuits
• Communication interfaces in noisy environments

Procurement Notes

Verify the specific suffix IS1 indicates tube packaging when ordering. Confirm the BB suffix corresponds to the 2500 Vrms isolation rating and standard performance specifications. Ensure compatibility with 16-SOIC footprint requirements during procurement planning.

Selection Notes

Select this component for applications requiring four-channel isolation with moderate speed requirements. Consider the 150 Mbps data rate limit and 8 ns propagation delay for timing-sensitive designs. Evaluate the 2500 Vrms isolation barrier against system safety standards.

Part Context

This part belongs to the Si864x family of digital isolators, which are designed to replace traditional optocouplers in modern electronic designs. The family offers improved performance characteristics including lower power consumption and higher reliability compared to legacy technologies.

Replacement Considerations

Direct replacements include SI8642AB-B-IS1 for lower isolation ratings or SI8642BC-B-IS1 for higher insulation voltage requirements. Verify pinout compatibility and thermal performance when substituting.