pliant with USB specification ver 2.0 - 4 downstream ports - Upstream port supports both high-speed (HS) and full-speed (FS) traffic - Downstream ports support HS, FS, and low-speed (LS) traffic - 1 control pipe (endpoint 0, 64-byte data payload) and 1 interrupt pipe (endpoint 1, 1-byte data payload) - Backward compatible with USB specification ver 1.1 2.On-chip 8-bit RISC micro-processor - USB optimized operation - Support customized PID, VID by external EEPROM 3.Single Transaction Translator (TT) architecture - Cost effective solution for TT through sharing the same TT control logic for all downstream port devices. 4.Each downstream port supports two-color status indicator, with automatic and manual modes compliant to USB specification Revision 2.0 5.Support both individual and gang modes of power management and over- current detection for downstream ports 6.Support both bus-power and self-power modes in suspend mode 7.Automatic switching between self-powered and bus-powered modes 8.Integrated USB2.0 transceiver 9. 0.35um CMOS technology 10. PLL embedded with external 12 MHz crystal 11. Operates on 3.3 Volts 12. Low power consumption 13. Improved output drivers with slew-rate control for EMI reduction 14. Internal power-fail detection for ESD recovery 15. 64-pin LQFP package