USB4640 Standard Microsystems Corp., USB4640 Datasheet - Page 54

• Manufacturer Part Number: USB4640
• Description: High Speed Inter-chip Hsic Usb 2.0 Hub And Flash Media Controller
• Manufacturer: Standard Microsystems Corp.

Revision 1.0 (06-09-09)
9.2
9.3
9.3.1
9.3.2
24 MHz ± 350 ppm
50% Duty cycle ± 10%, 24 MHz ± 350 ppm, Jitter < 1 00 ps rms.
The external clock is recommended to conform to the signaling level designated in the JESD76-2
specification on 1.8 V CMOS Logic. XTAL2 should be treated as a no connect.
I
Frequency is fixed at 58.6 kHz ± 20%
USB 2.0
The SMSC device 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.
Ceramic Resonator
External Clock
2
C EEPROM
Figure 9.3 Ceramic Resonator Usage with SMSC IC
DATASHEET
High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
54
SMSC USB4640/USB4640i
Datasheet