USB3280 SMSC Corporation, USB3280 Datasheet - Page 16

• Manufacturer Part Number: USB3280
• Description: Hi-Speed USB Device PHY
• Manufacturer: SMSC Corporation

Revision 1.2 (10-27-06)
6.1
UTMI Timing
DATA[7:0]
RXVALID
RXACTIVE
RXERROR
LINESTATE[1:0]
TXREADY
DATA[7:0]
TXVALID
OPMODE[1:0]
XCVRSELECT
TERMSELECT
DATA[7:0]
TXVALID
OPMODE[1:0]
XCVRSELECT
TERMSELECT
PARAMETER
Driver Characteristics of Full-Speed Drivers in High-Speed
Capable Transceivers
Note 6.5
The USB3280 uses a differential output driver to drive the USB data signal onto the USB cable.
Figure 6.1 Full-Speed Driver VOH/IOH Characteristics for High-speed Capable Transceiveron page 17
shows the V/I characteristics for a full-speed driver which is part of a high-speed capable transceiver.
The normalized V/I curve for the driver must fall entirely inside the shaded region. The V/I region is
bounded by the minimum driver impedance above (40.5 Ohm) and the maximum driver impedance
below (49.5 Ohm). The output voltage must be within 10mV of ground when no current is flowing in
or out of the pin.
Table 6.5 Dynamic Characteristics: Digital UTMI Pins
V
DD3.3
T
T
T
SYMBOL
PD
SU
H
= 3.0 to 3.6V; V
Output Delay. Measured
from PHY output to the
rising edge of CLKOUT
Setup Time. Measured
from PHY input to the
rising edge of CLKOUT.
Hold time. Measured from
the rising egde of
CLKOUT to the PHY input
signal edge.
DATASHEET
SS
= 0V; T
CONDITIONS
16
A
= -40
o
C to 85
Hi-Speed USB Device PHY with UTMI Interface
o
MIN
C; unless otherwise specified.
2
5
0
(Note
6.5)
TYP
MAX
5
SMSC USB3280
Datasheet
UNITS
ns
ns
ns