General Description
The MAX1940 triple current-limited switch with auto-reset supplies a guaranteed 500mA load per channel in accordance with USB specifications. The MAX1940 operates from a 4V to 5.5V input supply and consumes only 60µA of quiescent current when operating and only 3µA in standby. Selectable active-high/active-low control logic and independent shutdown controls for each channel provide additional flexibility. An autoreset feature latches the switch off in the event of a short circuit, saving system power. The switch reactivates upon removal of the shorted condition.

Features
♦ Triple USB Switch in Tiny 16-Pin QSOP Package
♦ Autoreset Feature Saves System Power
♦ Guaranteed 500mA Load Current per Channel
♦ Built-In 20ms Fault-Blanking Circuitry
♦ Active-High/Active-Low Control Logic
♦ Fully Compliant to USB Specifications
♦ 4V to 5.5V Input Voltage Range
♦ Independent Shutdown Control
♦ Independent Fault Indicator Outputs
♦ Thermal-Overload Protection
♦ 3µA Standby Current

Applications
   USB Ports
   USB Hubs
   Notebook Computers
   Desktop Computers
   PDAs and Palmtop
   Computers
   Docking Stations