USB2422

USB2422 2-Port USB 2.0 Hi-Speed Hub Controller PRODUCT FEATURES General Description The SMSC USB2422 hub is a low-power, single transaction translator, hub controller IC with two downstream ports for embedded USB solutions. The SMSC hub controller can attach to an upstream port as a Hi-Speed and Full-Speed hub or as a Full-Speed only hub. The SMSC hub supports Low-Speed, Full-Speed, and Hi-Speed (when configured as a Hi-Speed hub) downstream devices on the enabled downstream ports. All required resistors on the USB ports are integrated into the hub. This includes all series termination resistors on D+ and D- pins and all required pull-down and pull-up resistors on D+ and D- pins. The over-current sense inputs for the downstream facing ports have internal pull-up resistors. Datasheet Highlights    High performance, low-power, small footprint hub controller IC with two downstream ports Fully compliant with the USB 2.0 Specification Optimized for minimal bill-of-materials and low-cost designs Applications    Features                Supports the USB Battery Charging Specification, Revision 1.1 Fully integrated USB termination and pull-up/pulldown resistors Supports a single external 3.3 V supply source; internal regulators provide 1.2 V internal core voltage On-chip driver for 24 MHz crystal resonator or external 24 MHz clock input ESD protection up to 6 kV on all USB pins Supports self-powered operation SMSC hub contains a built-in default co...