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USB Hub with Integrated 10/100 Ethernet Controller
Datasheet
Revision 1.0 (04-20-09) 42 SMSC LAN9512
DATASHEET
4.5 AC Specifications
This section details the various AC timing specifications of the LAN9512.
Note: The USBDP and USBDM pin timing adheres to the USB 2.0 specification. Refer to the
Universal Serial Bus Revision 2.0 specification for detailed USB timing information.
4.5.1 Equivalent Test Load
Output timing specifications assume the 25pF equivalent test load illustrated in Figure 4.1 below.
4.5.2 Reset Timing
The nRESET pin input assertion time must be a minimum of 1 μS. Assertion of nRESET is not a
requirement. However, if used, it must be asserted for the minimum period specified.
Figure 4.1 Output Equivalent Test Load
25 pF
OUTPUT