SI88641EC-IS

Overview

The SI88641EC-IS is a general-purpose digital isolator from Skyworks Solutions, housed in a 24-SOIC package. It provides four unidirectional channels with a data rate of 100 Mb/s and an isolation voltage of 5000 Vrms. The device operates on a supply voltage between 3 V and 5.5 V, featuring a propagation delay of 18 ns. It utilizes capacitive coupling technology and offers a common-mode transient immunity of 40 kV/µs. The component supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Provides high-speed digital signal transmission across electrical isolation barriers using capacitive coupling technology.
• Integrates four independent unidirectional channels within a single compact surface-mount package.
• Delivers robust isolation performance with specified voltage ratings and high common-mode transient immunity.

Applications

• Industrial automation systems requiring galvanic isolation for sensor interfaces
• Medical equipment needing reliable signal separation for patient safety compliance
• Power electronics control circuits utilizing isolated gate drive signals

Procurement Notes

Verify the specific suffix against official Skyworks documentation to confirm pinout compatibility and thermal characteristics. Ensure the selected variant matches the required isolation voltage rating for the target application environment. Cross-reference the package dimensions with PCB layout constraints before finalizing procurement decisions.

Selection Notes

Select this component when four-channel unidirectional isolation is required at 100 Mb/s speeds. Consider the 24-SOIC footprint for space-constrained designs. Evaluate the 5000 Vrms isolation rating against system safety standards. Confirm that the 3 V to 5.5 V supply range aligns with the logic levels of the interfacing circuits.

Part Context

This part belongs to the Si8864x family of digital isolators designed for general-purpose applications. It complements other variants in the series that may offer different channel counts or bidirectional capabilities. The family shares similar packaging options and core isolation technologies, allowing for scalable design implementations across various industrial and commercial products.

Replacement Considerations

Direct substitutes include the SI88641EC-AS and SI88640EC-IS. Verify functional equivalence regarding channel count and isolation ratings. Check for pin-to-pin compatibility and identical package dimensions to ensure seamless integration without redesigning the printed circuit board.

FAQ

What is the common-mode transient immunity rating?

The SI88641EC-IS provides a common-mode transient immunity of 40 kV/µs.

Does this device support bidirectional communication?

No, the SI88641EC-IS is configured for unidirectional signal transmission only.