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USB2517I датащи(PDF) 51 Page - Microchip Technology

номер детали USB2517I
подробное описание детали  USB 2.0 Hi-Speed 7-Port Hub Controller
PDF  58 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB2517I датащи(HTML) 51 Page - Microchip Technology

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2013-2016 Microchip Technology Inc.
DS00001598B-page 51
USB2517/USB2517I
9.0
AC SPECIFICATIONS
9.1
Oscillator/Clock
Crystal: Parallel Resonant, Fundamental Mode, 24 MHz
350ppm.
External Clock: 50% Duty cycle
 10%, 24 MHz  350ppm
9.1.1
SMBUS INTERFACE
The MCHP Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the SMBus
1.0 Specification for Slave-Only devices (except as noted in Section 7.3, "SMBus Slave Interface").
9.1.2
I2C EEPROM
Frequency is fixed at 58.6KHz
20
9.1.3
USB 2.0
The MCHP Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the USB 2.0
Specification. Please refer to the USB 2.0 Specification for more information.
FIGURE 9-1:
TYPICAL CRYSTAL CIRCUIT
Note:
CB equals total board/trace capacitance.
FIGURE 9-2:
FORMULA TO FIND VALUE OF C1 AND C2
XT A L 1
(C S1 =
C B + C XTA L )
XT A L 2
(C S2 =
C B + C XTA L )
C 1
C 2
C L
1M e g
Cry s ta l
(C1 + CS1) x (C2 + CS2)
(C1 + CS1 + C2 + CS2)
CL
=



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