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.