Data Sheet
Table Of Contents
20
3.4.3 USB Interface
3.4.3.1 USB LS Driver and Receiver Parameters
Symbol
Parameter
Min
Typ
Max
Units
BR
Baud rate
-
1.5
-
Mbps
BR
ppm
Baud rate tolerance
-15000
-
15000
ppm
Driver specifications
V
OH
Output single ended high
Defined with 1.425 kΩ pull-up resistor to 3.6V.
2.8
-
3.6
V
V
OL
Output single ended low
Defined with 1.425 kΩ pull-down resistor to
ground.
0
-
0.3
V
V
CRS
Output single crossover voltage
1.3
-
2.0
V
T
LR
Data rise time
• Defined from 10% to 90% for rise time and 90% to 10% for
fall time.
75
-
300
ns
T
LF
Data fall time
• Defined from 10% to 90% for rise time and 90% to 10% for
fall time.
75
-
300
ns
T
LRFM
Rise and fall time matching
80
-
125
%
T
UDJ1
Source jitter total: to next transition
• Including frequency tolerance. Timing difference between the
differential data signals.
• Defined at crossover point of differential data signals.
-95
-
95
ns
T
UDJ2
Source jitter total: for paired transitions
• Including frequency tolerance. Timing difference between the
differential data signals.
• Defined at crossover point of differential data signals.
-150
-
150
ns
Receiver specifications
V
IH
Input single ended high
2.0
-
-
V
V
IL
Input single ended low
-
-
0.8
V
V
DI
Differential input sensitivity
0.2
-
-
V