Industrial Temperature Rated USB 2.0
Datasheet
Chapter 6 AC Specifications
6.1Oscillator/Clock
Crystal: Parallel Resonant, Fundamental Mode, 24 MHz ±350ppm.
External Clock: 50% Duty cycle ± 10%, 24 MHz ± 350ppm, Jitter < 100ps rms.
XTAL1(CS1 =
CB + CXTAL )
C1
Crystal CL | 1Meg |
C2 | XTAL2 |
| |
| (CS2 = |
| CB + CXTAL ) |
Note: CB equals total board/trace capacitance.
(C1 + CS1) x (C2 + CS2)
= CL
(C1 + CS1 + C2 + CS2)
Figure 6.2 Formula to find value of C1 and C26.1.1SMBus Interface:
The SMSC Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the SMBus 1.0 Specification for
6.1.2I2C EEPROM:
Frequency is fixed at 58.6KHz ± 20%.
6.1.3USB 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.
Revision 1.92 | 36 | SMSC USB2512i |
| DATASHEET |
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