General Description
The SMSC 2-Port Hub is fully compliant with the USB 2.0 Specification and will attach to a USB host as a Full-Speed Hub or as a Full-/High-Speed Hub.The 2-Port Hub supports Low-Speed, Full-Speed, and High-Speed (if operating as a High-Speed Hub) downstream devices on all of the enabled downstream ports.

PRODUCT FEATURES
Integrated USB 2.0 Compatible 2-Port Hub
— High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and Low-Speed (1.5Mbits/s) compatible
— Full power management with ganged power control
— Detects Bus-Power/Self-Power source and changes mode automatically
Complete USB Specification 2.0 Compatibility
— Includes USB 2.0 Transceivers
VID/PID/DID, and Port Configuration for Hub via:
— Single Serial I2C EEPROM
— SMBus Slave Port
Default VID/PID/DID, allows functionality when configuration EEPROM is absent
Hardware Strapping options allow for configuration without an external EEPROM or SMBus Host
On-Board 24MHz Crystal Driver Circuit or 24 MHz external clock driver
Internal PLL for 480MHz USB 2.0 Sampling
Internal 1.8V Linear Voltage Regulator
Integrated USB termination and Pull-up/Pull-down resistors
Internal Short Circuit protection of USB differential signal pins
Basic single-color LED support
1.8 Volt Low Power Core Operation
3.3 Volt I/O with 5V Input Tolerance
36 Pin QFN or 48 Pin TQFP lead-free RoHS compliant package