USB2512B View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
MFG CO.
'USB2512B' PDF : 63 Pages View PDF
USB 2.0 Hi-Speed Hub Controller
Datasheet
7.2
7.2.1
7.2.2
7.2.3
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 [5] on 1.2 V CMOS Logic. XTALOUT should be treated as a weak (<1mA) buffer output.
SMBus Interface
The SMSC hub conforms to all voltage, power, and timing characteristics and specifications as set
forth in the SMBus 1.0 Specification [3] for slave-only devices (except as noted in Section 5.3: SMBus
on page 42.
I2C EEPROM
Clock frequency is fixed at 60 kHz ± 20%.
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].
SMSC USB251xB/xBi
57
DATASHEET
Revision 2.2 (02-17-12)
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