USB2660 Standard Microsystems Corp., USB2660 Datasheet - Page 57

• Manufacturer Part Number: USB2660
• Description: Ultra Fast Usb 2.0 Hub And Multi-format Flash Media Controller With Dual Sd Interfaces
• Manufacturer: Standard Microsystems Corp.

Ultra Fast USB 2.0 Hub and Multi-Format Flash Media Controller with Dual SD Interfaces
Datasheet
SMSC USB2660/USB2660i
9.2
9.3
9.3.1
9.3.2
24 MHz ± 350 ppm
50% Duty cycle ± 10%, 24 MHz ± 350 ppm, Jitter < 100 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
57
Revision 1.0 (06-09-09)