Data Sheet

21
3.4.3.2 USB FS Driver and Receiver Parameters
Symbol
Parameter
Min
Typ
Max
Units
BR
Baud rate
-
12
-
Mbps
BR
ppm
Baud rate tolerance
-2500
-
2500
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
FF
Data fall time
Defined from 10% to 90% for rise time and 90% to 10% for
fall time.
-4
-
20
ns
T
FR
Data rise time
Defined from 10% to 90% for rise time and 90% to 10% for
fall time.
-4
-
20
ns
T
DJ1
Source jitter total: to next transition
Including frequency tolerance. Timing difference between the
differential data signals.
Defined at crossover point of differential data signals.
-3.5
-
3.5
ns
T
DJ2
Source jitter total: for paired transitions
Including frequency tolerance. Timing difference between the
differential data signals.
Defined at crossover point of differential data signals.
-4
-
4
ns
T
FDEOP
Source jitter for differential transition to SE0
transition
Defined at crossover point of differential data
signals.
-2
5
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
T
JR1
Receiver jitter: to next transition
Defined at crossover point of differential data
signals.
-18.5
-
18.5
ns
T
JR2
Receiver jitter: for paired transitions
Defined at crossover point of differential data
signals.
-9
-
9
ns
3.4.3.3 USB HS Driver and Receiver Parameters