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 V_AC and 40 V_DC, 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.

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