SI8642BB-B-IS

Overview

The SI8642BB-B-IS is a Skyworks Solutions Inc digital isolator featuring four channels with unidirectional signal paths. It operates within a supply voltage range of 2.375 V to 5.5 V and supports data rates up to 150 Mbps. The device provides an isolation voltage of 2500 Vrms using capacitive coupling technology. Key electrical parameters include a maximum propagation delay of 8 ns, rise/fall times of 4 ns, and power dissipation of 275 mW. It functions reliably across an operating temperature range of -40 °C to +125 °C and meets AEC-Q100 automotive qualification standards.

Feature Summary

• Provides high-speed digital isolation via capacitive coupling for general-purpose applications
• Features four independent unidirectional channels for flexible signal routing
• Ensures robust noise immunity with high common-mode transient rejection capabilities
• Complies with international safety standards including UL, IEC, and CSA certifications

Applications

• Industrial automation systems requiring galvanic isolation
• Automotive electronics meeting AEC-Q100 reliability standards
• Medical equipment needing certified isolation barriers
• Power conversion circuits for gate drive isolation

Procurement Notes

Verify the specific suffix against official Skyworks documentation to confirm package type and tape/reel configuration. Ensure the ordering part number matches the required insulation voltage and channel directionality. Cross-reference the manufacturer datasheet for any recent product change notices affecting pinout or specifications before finalizing procurement orders.

Selection Notes

Select this component when four isolated bidirectional or unidirectional channels are required in a single package. Consider the 150 Mbps data rate and 2500 Vrms isolation rating for standard industrial interfaces. Evaluate the SOIC-16 footprint constraints and thermal dissipation requirements relative to the 275 mW power consumption at maximum operating temperatures.

Part Context

This device belongs to the Si864x family of digital isolators from Skyworks Solutions. The family utilizes proprietary CMOS isolation technology to replace traditional magnetic couplers. These components offer superior performance in terms of size, power consumption, and reliability compared to legacy isolation solutions.

Replacement Considerations

Check for direct substitutes within the Si864x series such as SI8642BC variants for higher isolation ratings. Verify compatibility with existing PCB footprints and ensure equivalent electrical characteristics match the original design requirements.