SI8645BD-B-ISR

Digital Isolators Overview

The SI8645BD-B-ISR 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 5000 Vrms. The device supports unidirectional data transmission at a maximum data rate of 150 Mb/s and features a typical propagation delay of 8 ns. It operates within a supply voltage range of 2.375 V to 5.5 V and is qualified under AEC-Q100 standards for automotive applications. The component is housed in a 16-pin SOIC-Wide package and 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.
• Features integrated shutdown functionality to minimize power consumption during idle states.
• Includes internal transient filtering to ensure immunity against common-mode noise spikes.
• Offers bidirectional logic compatibility with standard CMOS and LSTTL output levels.

Digital Isolators Applications

• Automotive electronic control units requiring AEC-Q100 certified isolation
• Industrial communication interfaces such as RS-485 and CAN bus systems
• Power conversion circuits involving gate drive signal isolation
• Medical equipment requiring reinforced safety isolation barriers

Digital Isolators Procurement Notes

Verify the specific suffix 'B' indicates the wide body package variant and 'R' denotes reel packaging configuration. Confirm that the AEC-Q100 qualification status meets your specific automotive grade requirements. Ensure the 5000 Vrms insulation rating aligns with your system's safety isolation standards. Check for RoHS compliance documentation if required by your manufacturing regulations.

Digital Isolators Selection Notes

Select this component when four isolated channels are required for unidirectional signal transmission. The 150 Mb/s data rate suits most industrial and automotive communication protocols. The wide SOIC package facilitates thermal management and PCB layout compared to narrower alternatives. Consider the 5000 Vrms rating for applications demanding higher isolation margins than standard 2500 Vrms devices.

Digital Isolators Part Context

This part belongs to the Si864x family of digital isolators, which are designed to replace traditional magnetic couplers. The family offers improved performance in terms of speed, power consumption, and size. The SI8645 variant specifically provides four channels, making it suitable for multi-line data buses or parallel signal isolation tasks in compact designs.

Digital Isolators Replacement Considerations

SI8645BD-B-IS is the tube-packaged equivalent of this reel-based component. SI8645BB-B-ISR offers similar functionality but with a lower 2500 Vrms insulation rating. SI8645BC-B-IS1R provides 3750 Vrms isolation in a narrow SOIC package. Verify package width and insulation voltage before substituting.