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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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USB251 Scheda tecnica(PDF) 45 Page - Microchip Technology |
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USB251 Scheda tecnica(HTML) 45 Page - Microchip Technology |
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45 / 57 page  2010 - 2015 Microchip Technology Inc. DS00001692C-page 45 USB251xB/xBi 7.2 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 [5] on 1.2 V CMOS Logic. XTALOUT should be treated as a weak (<1mA) buffer output. 7.2.1 SMBUS INTERFACE The hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the SMBus 1.0 Spec- ification [3] for slave-only devices (except as noted in Section 5.3, "SMBus," on page 33. 7.2.2 I2C EEPROM Clock frequency is fixed at 60 kHz 20 7.2.3 USB 2.0 The Microchip 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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