SI8642BB-B-IS1R

Overview

The SI8642BB-B-IS1R is a general-purpose digital isolator from the Si864x series, manufactured by Skyworks Solutions Inc. It features four channels with a unidirectional configuration, providing electrical isolation via capacitive coupling. The device supports data rates up to 150 Mb/s and offers an insulation voltage of 2500 Vrms. It operates within a supply voltage range of 2.5 V to 5.5 V and maintains performance across a temperature range of -40°C to +125°C. Packaged in a 16-SOIC (3.90 mm wide) format, it includes a minimum common-mode transient immunity of 35 kV/µs.

Feature Summary

• Capacitive coupling technology for high-speed signal transmission
• Unidirectional channel architecture for isolated data paths
• High common-mode transient immunity for noise resilience
• Wide operating temperature range for industrial environments

Applications

• Industrial automation control systems
• Medical equipment signal isolation
• Power metering and energy monitoring
• General-purpose digital communication interfaces

Procurement Notes

Verify the specific suffix 'B' indicates the correct package width and pinout configuration for your PCB layout. Confirm that the 'IS1R' designation matches the required reel packaging format for your assembly line. Ensure compatibility with the 2.5 V to 5.5 V supply rails before integration. Check for RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select this component when a 150 Mb/s data rate and 2500 Vrms isolation are sufficient for the application. Consider the 16-SOIC narrow package dimensions against available board space. Evaluate the unidirectional nature of the channels to ensure it aligns with the signal flow requirements of the circuit design.

Part Context

This part belongs to the Si864x family of digital isolators, which utilizes Skyworks' proprietary capacitive isolation technology. The family provides various channel counts and isolation voltages. The SI8642 variant specifically offers four channels, balancing channel density with performance metrics suitable for complex digital isolation tasks.

Replacement Considerations

SI8642BC-B-IS1R: Offers higher 3750 Vrms isolation with identical pinout and speed.

FAQ

What is the maximum data rate supported by this isolator?

The SI8642BB-B-IS1R supports a maximum data rate of 150 Mb/s.

Does this device support bidirectional communication?

No, the SI8642BB-B-IS1R features a unidirectional channel configuration only.