SI8642BA-B-IUR

Digital Isolators Overview

The SI8642BA-B-IUR is a general-purpose digital isolator from the Si864x series, manufactured by Skyworks Solutions Inc. It features four unidirectional channels with capacitive coupling technology. The device supports data rates up to 150 Mbps and offers an insulation voltage of 1000 Vrms. Key electrical parameters include a propagation delay of 8 ns, rise/fall times of 4 ns, and a common-mode transient immunity (CMTI) of 35 kV/µs. It operates on a supply voltage range of 2.375 V to 5.5 V, with a typical power consumption of 6.6 mA. The component is housed in a 16-SSOP package and functions within a temperature range of -40°C to +125°C.

Digital Isolators Feature Summary

• Provides galvanic isolation via capacitive coupling for noise immunity
• Supports high-speed digital signal transmission at 150 Mbps
• Features bidirectional logic configuration with four independent channels
• Ensures safety compliance through certified insulation ratings

Digital Isolators Applications

• Industrial automation control systems
• Medical equipment signal isolation
• Power electronics gate drive circuits
• Communication interface isolation

Digital Isolators Procurement Notes

Verify the specific suffix 'B' indicates the standard operating temperature range and 'IUR' denotes tape-and-reel packaging. Confirm that the 1000 Vrms rating meets your system's safety requirements. Check for RoHS compliance status as per the latest datasheet revision. Ensure ESD handling procedures are followed during assembly due to the sensitivity of the internal capacitive isolation structure.

Digital Isolators Selection Notes

Select this part when a 1000 Vrms isolation barrier is sufficient for the application. The 150 Mbps speed suits most industrial protocols. Consider the 16-pin SSOP footprint for PCB layout constraints. Compare against higher CMTI variants if extreme noise environments are present. Verify voltage levels match both input and output logic families.

Digital Isolators Part Context

This component belongs to the Si864x family of digital isolators, which utilizes Skyworks' proprietary capacitive isolation technology. This family replaces traditional magnetic isolators, offering smaller form factors and lower power consumption. The SI8642 variant specifically provides four isolated channels, making it suitable for complex multi-signal isolation tasks in compact designs.

Digital Isolators Replacement Considerations

Check for direct pin-compatible replacements within the same Si864x series with different insulation ratings, such as SI8642BC or SI8642BD, if higher voltage isolation is required. Verify that any substitute maintains the 150 Mbps data rate and 16-SSOP package dimensions.