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Maxim Integrated


The MAX22505 protection device from Maxim Integrated combines USB fault protection against the high voltages found in industrial systems at high data-transfer rates of up to 480Mbits/s, while providing the flexibility to support either host or device applications including USB On-The-Go (OTG).

The introduction of the MAX22505 is a response to a trend in industrial system design to reduce footprint and increase productivity and throughput while maintaining robust performance and high uptime. This has led designers to adopt USB in preference to the older RS-232 communications protocol for automation equipment, enabling system designs to benefit from the smaller size of the USB connector as well as the USB protocol’s high data-transfer rates.

USB ports in industrial equipment require protection from over-voltage and ground differences while maintaining communications performance at high data rates. 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 the voltage- or current-limit protection on a device’s data and power lines.

By contrast, the MAX22505 supports high-speed operation while protecting equipment from over-voltage or negative voltage on power and data lines, as well as ground-potential differences between devices. It reduces solution size by more than half compared to competing solutions, and ensures robust communication in harsh environments cost-effectively in a simple design.


MAX22505: Protects against voltages up to 50V on USB power lines


  • ±50V DC protection for power lines
  • ±40.7V DC protection for D+/D- data lines
  • 24-pin 4mm x 4mm TQFN package
  • Operating-temperature range: -40°C to 105°C
  • Building automation
  • Industrial PCs
  • Programmable logic controllers
  • Machine vision systems
  • Diagnostic USB ports
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