SI8642BB-AUR

Overview

The SI8642BB-AUR 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 operates within a supply voltage range of 2.375 V to 5.5 V. Key electrical parameters include a propagation delay of 8 ns, rise and fall times of 4 ns, and a pulse width distortion of less than 4.5 ns. It functions reliably across an operating temperature range of -40°C to +125°C and is housed in a QSOP-16 package.

Feature Summary

• Four-channel unidirectional signal isolation using capacitive coupling technology
• High-speed data transmission capability supporting rates up to 150 Mbps
• Wide operating supply voltage range accommodating 2.375 V to 5.5 V inputs
• Extended industrial temperature operation from -40°C to +125°C

Applications

• General purpose digital isolation in industrial automation systems
• Isolation interfaces for automotive electronic control units
• Signal transmission between microcontrollers and peripheral devices
• Power management circuit isolation in energy monitoring equipment

Procurement Notes

Verify the specific suffix AUR against official Skyworks documentation to confirm packaging configuration and tape-and-reel specifications. Ensure compatibility with QSOP-16 footprint requirements during PCB layout. Confirm that the 2500 Vrms isolation rating meets the safety standards required for your specific application environment. Cross-reference the AEC-Q100 qualification status if automotive reliability is a mandatory project requirement.

Selection Notes

Select this component when four isolated channels are required in a compact surface-mount form factor. The SI8642BB-AUR is suitable for designs needing high-speed data integrity with moderate isolation voltage levels. Consider the 8 ns propagation delay for timing-critical applications. Evaluate power consumption constraints as the device draws current proportional to data rate and supply voltage. Compare against other Si864x variants if bidirectional communication or higher isolation ratings are necessary.

Part Context

This part belongs to the Si864x family of digital isolators, which are designed to replace traditional magnetic couplers. The family offers various channel configurations and isolation voltages. The SI8642 variant specifically provides four forward channels. The AUR suffix typically denotes a specific reel quantity or packaging option within the manufacturer's distribution network, distinct from tube-packaged equivalents like the AU variant.

FAQ

Does the SI8642BB-AUR support bidirectional data transmission?

No, the SI8642BB-AUR is configured for unidirectional signal isolation only, providing four forward channels without reverse feedback paths.

What is the maximum data rate supported by this isolator?

The device supports data rates up to 150 Mbps, ensuring high-speed communication capabilities for digital signals.