MAX22505 High-Speed USB Port Protector

Featured Product from Digi-Key Electronics

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Maxim’s high-speed USB port protector is designed to protect a USB port on commercial and industrial equipment against damage due to faulty or incorrectly wired power supplies. The USB port is protected against connection to typical 24 VDC or 24 VAC systems with a maximum data line protection of ±40.7 V and power/ground line protection up to ±50 V.

The VBUS, ground, and connector shield connections can be configured for any level of ESD, burst, and surge protection by choosing external components. USB data D+ and D- are protected by external diode clamps to VBUS and GND, allowing for the lowest possible insertion loss while providing high ESD and burst protection.

The devices is housed in a 24-pin, 4 mm x 4 mm TQFN package with exposed pad and is specified for operation over the -40°C to +105°C temperature range.

Features    
  • Robust communications
    • Integrated ±50 VDC protection for VBUS/GND
    • Integrated ±40.7 VDC protection for D+/D-
    • Thermal shutdown protected
    • -40°C to +105°C operating temperature
  • Flexibility
    • Transparent to USB operation speeds
    • Configurationless USB host or device protection
    • Optional external MOSFET driver for VBUS and GND paths
  • Proprietary constant on-time control
 
  • High performance
    • Transparent to USB operation speeds
    • Configurationless USB host or device protection
    • 4 Ω (typ) VBUS/D+/D- channel resistance
    • 1 Ω (max) GND channel resistance
    • High-speed USB disable mode allowing operation with high common mode voltages
  • Supports USB OTG
  • Simpler than USB isolation
Applications    
  • Diagnostic USB ports
  • Industrial PCs
 
  • Programmable logic controllers (PLC)