SI8642BB-B-IU

Overview

The SI8642BB-B-IU 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 data rates up to 150 Mbps and features a propagation delay of 8 ns. It operates within a supply voltage range of 2.375 V to 5.5 V and dissipates 275 mW of power. The component is housed in a 16-pin QSOP package and is qualified under AEC-Q100 standards for automotive applications.

Feature Summary

• Provides galvanic isolation between circuits using capacitive coupling technology
• Supports high-speed data transmission with a maximum rate of 150 Mbps
• Includes a shutdown function for power management control
• Qualified for automotive reliability standards

Applications

• Automotive electronic systems requiring isolated signal transmission
• Industrial communication interfaces needing high common-mode transient immunity
• General-purpose digital isolation in mixed-signal environments

Procurement Notes

Verify the specific suffix against official Skyworks documentation to confirm package type and orientation. Ensure the procurement channel provides valid RoHS compliance certificates. Confirm that the supplier sources directly from authorized distributors to guarantee authenticity. Check for moisture sensitivity level requirements during storage and handling prior to assembly.

Selection Notes

Select this component when bidirectional isolation is required with two forward and two reverse channels. It is suitable for designs needing 2500 Vrms isolation strength. Consider the 16-pin QSOP footprint for board space constraints. Verify that the 150 Mbps speed meets the system timing requirements compared to lower-speed alternatives.

Part Context

This part belongs to the Si864x family of digital isolators. The family offers various channel configurations and isolation voltages. The SI8642 variant specifically provides a 2/2 channel split. Other members include unidirectional options or different isolation ratings within the same package lineup.

Replacement Considerations

SI8642BA-B-IU: Offers 1000Vrms isolation in SSOP-16. SI8642BD-B-IS: Provides 5kVrms isolation in SOIC-Wide-16. SI8642BB-B-IS1R: Same specs but in SOIC-16 tape-and-reel packaging.