With the MAX22505 ±40 V high-speed USB fault protector from Maxim Integrated Products, system designers can now eliminate USB port damage from all faults, including ground potential differences, up to ±40 V without the trade-offs required by competing solutions. It protects data and power lines from industrial equipment powered at 24 VAC and 40 VDC, while also reducing solution size by more than 50% for industrial voltage applications.

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 Mbps.

Damage to both the host and device side can occur in these systems, requiring a solution that achieves high levels of fault protection. Existing USB fault protection solutions on the market today compromise either USB operating speed or voltage/current limit protection on a device's data and power lines. That all means that current solutions on the market are more costly and incapable of providing fault protection at high-speed USB performance. The MAX22505 answers this market need by combining high-speed USB fault protection (480 Mbps) 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.