Datasheet

2-Port USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB2412 21 Revision 1.3 (12-27-11)
DATASHEET
5.2 External Clock
50% Duty cycle ± 10%, 24 MHz ± 350 ppm, Jitter < 100 ps rms.
The external clock is recommended to conform to the signaling level designated in the JESD76-2
specification on 1.2 V CMOS Logic. XTALOUT should be treated as a no connect.
5.2.1 USB 2.0
The SMSC hub conforms to all voltage, power, and timing characteristics and specifications as set
forth in the USB 2.0 Specification 1. See the USB Specification for more information.