Maxim Provides True Fault Protection for High-Speed USB Ports and Industrial Voltage Applications

June 5, 2018 Rich Nass

Maxim Integrated Products’ MAX22505 high-speed USB fault protector lets designers eliminate USB port damage from all faults, including ground potential differences, up to ±40 V. It protects data and power lines from industrial equipment powered at 24 VAC and 40 VDC, while also reducing solution size by a significant margin, as it’s housed in a 24-pin, 4- by 4-mm TQFN package.

As industrial environments adopt USB to provide faster communication for applications such as real-time diagnostics, programming/service ports on programmable logic controllers (PLCs), or supporting camera vision systems, USB ports require fault protection from overvoltage and ground differences while balancing the need to support high-speed data rates up to 480 Mbits/s. Damage to both the host and device side can occur in these systems.

The MAX22505 combines high-speed USB fault protection for industrial voltages, while being flexible enough to support either host or device applications including USB On-The-Go (OTG). It protects equipment from overvoltage or negative voltage on power and data lines, as well as ground potential differences between devices., it operates over the -40°C to +105°C temperature range. Applications include building automation, industrial PCs, PLCs, and diagnostic USB ports.

The MAX22505 sells for $2.24. An evaluation kit is also available.

About the Author

Rich Nass

Richard Nass is the Executive Vice-President of OpenSystems Media. His key responsibilities include setting the direction for all aspects of OpenSystems Media’s Embedded and IoT product portfolios, including web sites, e-newsletters, print and digital magazines, and various other digital and print activities. He was instrumental in developing the company's on-line educational portal, Embedded University. Previously, Nass was the Brand Director for UBM’s award-winning Design News property. Prior to that, he led the content team for UBM Canon’s Medical Devices Group, as well all custom properties and events in the U.S., Europe, and Asia. Nass has been in the engineering OEM industry for more than 25 years. In prior stints, he led the Content Team at EE Times, handling the Embedded and Custom groups and the TechOnline DesignLine network of design engineering web sites. Nass holds a BSEE degree from the New Jersey Institute of Technology.

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