LAN9514_12 Datasheet, PDF (46/52 Pages) SMSC Corporation – USB 2.0 Hub and 10/100 Ethernet Controller

USB 2.0 Hub and 10/100 Ethernet Controller
Datasheet
4.5
4.5.1
AC Specifications
This section details the various AC timing specifications of the LAN9514/LAN9514i.
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.
Equivalent Test Load
Output timing specifications assume the 25pF equivalent test load illustrated in Figure 4.1 below.
OUTPUT
25 pF
4.5.2
Figure 4.1 Output Equivalent Test Load
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.
Revision 1.2 (02-29-12)
46
DATASHEET
SMSC LAN9514/LAN9514i