SI8642BB-B-ISR

Overview

The SI8642BB-B-ISR is a Skyworks Solutions digital isolator featuring four unidirectional channels in a 16-SOIC package. It operates on a supply voltage range of 2.375 V to 5.5 V with a maximum power dissipation of 275 mW. The device supports data rates up to 150 Mb/s and provides an insulation voltage of 2500 Vrms. Key timing parameters include an 8 ns propagation delay, 4 ns rise/fall times, and 5 ns pulse width capability. It functions within a temperature range of -40°C to +125°C and utilizes capacitive coupling technology.

Feature Summary

• Provides galvanic isolation via capacitive coupling technology for general-purpose signal transmission.
• Features high common-mode transient immunity rated at 35 kV/µs for noise resilience.
• Supports automotive applications through AEC-Q100 qualification standards.

Applications

• Automotive electronic control units
• Industrial communication interfaces
• Power conversion systems

Procurement Notes

Verify the specific suffix 'B' indicates the correct insulation rating and channel configuration for your design requirements. Confirm the 'ISR' suffix matches the required tape-and-reel packaging format. Ensure compatibility with the 16-SOIC footprint dimensions during PCB layout. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when a 2500 Vrms isolation barrier is sufficient for the application's safety requirements. The unidirectional channel architecture suits simple signal forwarding tasks without reverse data flow needs. Consider the 150 Mb/s speed limit against higher-speed protocol demands. Evaluate the SOIC-16 package size constraints relative to available board space.

Part Context

This part belongs to the Si864x family of digital isolators from Skyworks Solutions. The series offers various insulation ratings and channel configurations to suit different isolation needs. The SI8642 variant specifically provides four channels, distinguishing it from lower-channel-count models in the same product line.

Replacement Considerations

SI8642BD-B-ISR offers similar specifications but with a higher 5000 Vrms insulation rating. SI8642AB-B-ISR provides comparable performance with a 2500 Vrms rating. Verify pinout and electrical parameters before substituting these alternatives.