SI8645BB-B-IUR

Digital Isolators Overview

The SI8645BB-B-IUR is a four-channel digital isolator from the Si864x series, manufactured by Skyworks Solutions Inc. It utilizes capacitive coupling technology to provide electrical isolation with a rated insulation voltage of 2500 Vrms. The device supports unidirectional data transmission at a maximum data rate of 150 Mb/s. It operates within a supply voltage range of 2.375 V to 5.5 V and features a typical propagation delay of 8 ns. The component is housed in a 16-lead QSOP package and is qualified under AEC-Q100 standards for automotive applications. It functions reliably across an operating temperature range of -40°C to +125°C.

Digital Isolators Feature Summary

• Provides high-speed digital signal isolation using robust capacitive coupling technology.
• Offers four independent unidirectional channels for versatile system integration.
• Ensures reliable operation in harsh environments with high common-mode transient immunity.
• Meets automotive reliability standards through AEC-Q100 qualification.

Digital Isolators Applications

• Automotive powertrain and battery management systems
• Industrial motor control and drive circuits
• Medical equipment requiring galvanic isolation

Digital Isolators Procurement Notes

Verify the specific suffix 'IUR' indicates tape-and-reel packaging when sourcing components. Confirm that the manufacturer designation matches Skyworks Solutions Inc., as Silicon Laboratories was previously associated with this product line. Ensure the part meets RoHS compliance requirements for your manufacturing process. Cross-reference the datasheet revision to confirm technical specifications remain consistent with current design requirements.

Digital Isolators Selection Notes

Select this component when four isolated channels are required for unidirectional signal transmission. The 2500 Vrms isolation rating suits applications demanding high safety margins between circuit domains. Consider the 150 Mb/s data rate capability for high-speed communication interfaces. The wide operating temperature range makes it suitable for automotive and industrial environments where thermal stability is critical.

Digital Isolators Part Context

This device belongs to the Si864x family of digital isolators, which are designed to replace traditional optocouplers in modern electronic designs. The family offers superior performance characteristics including lower power consumption, smaller form factors, and higher reliability. The SI8645 variant specifically provides four channels, making it ideal for complex systems requiring multiple isolated signal paths without increasing board space significantly.

Digital Isolators Replacement Considerations

The SI8645BA-B-IU is a related part number within the same series but typically specifies a lower isolation voltage rating of 1000 Vrms. Verify isolation requirements before substituting, as the BB suffix denotes the higher 2500 Vrms rating. Other variants in the Si864x family may offer different channel counts or bidirectional capabilities.