USB2514I SMSC Corporation, USB2514I Datasheet - Page 47

• Manufacturer Part Number: USB2514I
• Description: Industrial Temperature Rated USB 2.0 High-Speed 4-Port Hub Controller
• Manufacturer: SMSC Corporation

Industrial Temperature Rated USB 2.0 High-Speed 4-Port Hub Controller
Datasheet
Chapter 6 AC Specifications
SMSC USB2514i
6.1
6.1.1
6.1.2
6.1.3
C
C
1
2
Crystal: Parallel Resonant, Fundamental Mode, 24 MHz ±350ppm.
External Clock: 50% Duty cycle ± 10%, 24/48 MHz ± 350ppm, Jitter < 100ps rms.
Note: C
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
Slave
I2C EEPROM:
Frequency is fixed at 58.6KHz ± 20%.
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.
Oscillator/Clock
Interface").
B
equals total board/trace capacitance.
Figure 6.2 Formula to find value of C
(C
C ry s ta l
(C
1
1
+ C
Figure 6.1 Typical Crystal Circuit
+ C
S1
S1
) x (C
DATASHEET
C
+ C
L
2
2
47
+ C
+ C
S2
S2
)
)
1 M e g
1
=
and C
C
L
2
Revision 1.98 (11-19-07)
Section 4.4, "SMBus
C
C
B
B
X T A L 2
X T A L 1
(C
+ C
(C
+ C
S 2 =
S 1 =
X T A L
X T A L
)
)