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USB5532B 数据表(PDF) 34 Page - Microchip Technology |
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USB5532B 数据表(HTML) 34 Page - Microchip Technology |
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34 / 40 page ![]() 2-Port SS/HS USB Hub Controller Datasheet Revision 1.2 (05-31-13) 34 SMSC USB5532B DATASHEET 7.2 External Clock 50% duty cycle ± 10%, 25 MHz ± 30 ppm, jitter < 100 ps rms. Note: The external clock is based upon 1.2 V CMOS Logic. XTALOUT should be treated as a no connect when an external clock is supplied. 7.2.1 SMBus Clock The maximum frequency allowed on the SMBus clock line is 100 kHz. 7.2.2 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]. |
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