AU6254 Datasheet, PDF (26/30 Pages) List of Unclassifed Manufacturers – USB2.0 Hub Controller

Table 5.8 Low-speed Source Electrical Characteristics
Driver Characteristics:
SYMBOL
PARAMETER
T_LR
T_LF
T_LRFM
C_LINUA
Rise Time
Fall Time
Differential Rise and Fall Time Matching
Upstream Facing Port (w/cable, low-speed only)
LIMITS
MIN
MAX
75
300
75
300
80
125
200
450
Clock Timings:
SYMBOL
T_LDRATHS
T_LDRATE
PARAMETER
Low-speed Data Rate for hubs and devices
which are high-speed capable
Low-speed Data Rate for devices which are
not high-speed capable
Low-speed Data Timings:
SYMBOL
PARAMETER
T_UDJ1
T_UDJ2
T_LDEOP
T_DJR1
T_DJR2
T_DDJ1
T_DDJ2
T_UJR1
T_UJR2
T_LEOPT
T_LEOPR
T_LST
Upstream facing port source Jitter
Total(including frequency tolerance):
To Next Transition
For Paired Transitions
Upstream facing port source Jitter for
Differential Transition to SE0 Transition
Upstream facing port differential
Receiver Jitter:
To Next Transition
For Paired Transitions
Upstream facing port differential
Receiver Jitter:
To Next Transition
For Paired Transitions
Downstream facing port Differential
Receiver Jitter:
To Next Transition
For Paired Transitions
Source SE0 interval of EOP
Receiver SE0 interval of EOP
Width of SE0 interval during differential
transition
LIMITS
MIN
MAX
1.49925
1.50075
1.4775
1.5225
LIMITS
MIN
MAX
-95
95
-150
150
-40
100
-75
-45
-25
-14
-152
-200
1.25
670
75
45
25
14
152
200
1.50
210
UNIT
ns
ns
%
pF
UNIT
Mb/s
Mb/s
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
μs
ns
ns
AU6254 USB2.0 Hub Controller V1.00W
Official Release_ Public
Page 26 of 30