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USB2513 Datasheet(PDF) 46 Page - SMSC Corporation

No. de pieza USB2513
Descripción Electrónicos  USB 2.0 High-Speed 3-Port Hub Controller
PDF  48 Pages
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Fabricante Electrónico  SMSC [SMSC Corporation]
Página de inicio  http://www.smsc.com
Logo SMSC - SMSC Corporation

USB2513 Datasheet(HTML) 46 Page - SMSC Corporation

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USB 2.0 High-Speed 3-Port Hub Controller
Datasheet
Revision 1.98 (11-19-07)
46
SMSC USB2513
DATASHEET
Chapter 6 AC Specifications
6.1
Oscillator/Clock
Crystal: Parallel Resonant, Fundamental Mode, 24 MHz
±350ppm.
External Clock: 50% Duty cycle
± 10%, 24/48 MHz ± 350ppm, Jitter < 100ps rms.
Figure 6.1 Typical Crystal Circuit
Note: CB equals total board/trace capacitance.
Figure 6.2 Formula to find value of C1 and C2
6.1.1
SMBus Interface:
The SMSC 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 4.4, "SMBus
Slave Interface").
6.1.2
I2C EEPROM:
Frequency is fixed at 58.6KHz
± 20%.
6.1.3
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. Please refer to the USB 2.0 Specification for more information.
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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