SI8642EA-AU

Digital Isolators Overview

The SI8642EA-AU is a low-power, quad-channel digital isolator from the Si864x series by Skyworks Solutions Inc. It features four unidirectional channels with a data rate of 150 Mb/s and an insulation voltage of 1000 Vrms. The device utilizes capacitive coupling for signal isolation and operates on a supply voltage ranging from 2.375 V to 5.5 V. Key electrical parameters include a propagation delay of 8 ns, a maximum rise/fall time of 4 ns, and a typical operating current of 11 mA. It is qualified under AEC-Q100 standards for automotive applications and supports a wide operating temperature range from -40°C to +125°C.

Digital Isolators Feature Summary

• Provides high-speed digital isolation with 150 Mb/s data rate capability across four independent channels.
• Utilizes capacitive coupling technology to ensure robust signal transmission with high common-mode transient immunity.
• Designed for low power consumption, making it suitable for energy-efficient system designs.
• Automotive qualified to meet rigorous reliability standards required for vehicle electronics.

Digital Isolators Applications

• Automotive infotainment systems requiring isolated communication interfaces
• Industrial automation controllers needing reliable signal isolation
• Medical equipment requiring patient safety isolation barriers

Digital Isolators Procurement Notes

Verify the specific suffix 'AU' corresponds to the QSOP-16 package when sourcing. Confirm AEC-Q100 qualification status if automotive grade is required. Check datasheet for humidity sensitivity handling instructions during assembly. Ensure supply voltage matches the 2.375 V to 5.5 V operational range. Validate channel configuration matches the unidirectional requirement of this specific part number.

Digital Isolators Selection Notes

Select this component when four isolated channels are needed with moderate speed requirements up to 150 Mb/s. Consider the 1000 Vrms isolation rating against system voltage requirements. Evaluate the 11 mA operating current against total system power budgets. Compare package dimensions of the QSOP-16 form factor against PCB layout constraints. Verify compatibility with existing logic levels and interface protocols.

Digital Isolators Part Context

This part belongs to the Si864x family of quad-channel digital isolators. It shares core isolation technology with other variants in the series but differs in package type and specific electrical characteristics like insulation voltage and shutdown functionality. The 'E' designation typically indicates specific performance or packaging variations within the broader product line.

Digital Isolators FAQ

Does the SI8642EA-AU support bidirectional communication?

No, the SI8642EA-AU is configured as a unidirectional isolator, meaning signals flow only from input to output.

What is the common-mode transient immunity (CMTI) of this device?

The device offers a CMTI of 35 kV/µs, ensuring reliable operation in noisy environments with fast-changing voltages.