AT43301

Features:

•Bus or Self Powered USB Hub Operation
•Bus Powered Controller in the Self Powered Mode
•One Upstream Port Plus Four Downstream Ports
• Integrated Hub Protocol Controller
•Global Over-Current Sensing
•Ganged Port Power Switching
• 6 MHz Oscillator with PLL
•On Chip 3.3V Voltage Regulator
•24-Pin SOIC


Description

The Atmel AT43301 USB Hub Controller is designed for use in very, low cost self powered or bus powered USB hubs. Application for such hubs are as a standalone hub for use with portable/notebook PCs, as well as an embe-dded hub in peripherals such as keyboards. The AT43301 supports one upstream port and four downstream ports. AT43301 handles all the hub protocols, thus offloading the user from the details of the USB operations. The chip is USB Spec Rev 1.1 compliant and is available in a 24-pin SOIC Package.