307013-003 Datasheet, PDF (809/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

Electrical Characteristics
Table 23-15. Universal Serial Bus Timing
Sym
Parameter
Min Max Units
Notes
Fig
Full-speed Source¹
t100 USBPx+, USBPx- Driver Rise Time
t101 USBPx+, USBPx- Driver Fall Time
t102
t103
Source Differential Driver Jitter
To Next Transition
For Paired Transitions
Source SE0 interval of EOP
4
20
ns
Note ²,
CL = 50 pF
23-13
4
20
ns
Note ²,
CL = 50 pF
23-13
–3.5 3.5
ns
–4
4
ns
160 175
ns
3, 4
23-14
5
23-15
t104
Source Jitter for Differential Transition
to SE0 Transition
–2
5
ns
6
t105
t106
Receiver Data Jitter Tolerance
To Next Transition
For Paired Transitions
EOP Width: Must accept as EOP
–18.5 18.5
ns
–9
9
ns
82
—
ns
4
23-14
5
23-15
t107
Width of SE0 interval during differential
transition
—
14
ns
Low-speed Source⁷
t108 USBPx+, USBPx – Driver Rise Time
t109 USBPx+, USBPx – Driver Fall Time
t110
t111
Source Differential Driver Jitter
To Next Transition
For Paired Transitions
Source SE0 interval of EOP
75 300
75 300
–25
–14
1.25
25
14
1.50
Note ^{2, 8}_,
ns
CL = 50 pF 23-13
CL = 350 pF
Note ^{2, 8},
ns
CL = 50 pF 23-13
CL = 350 pF
ns
3, 4
23-14
ns
µs
5
23-15
t112
Source Jitter for Differential Transition
to SE0 Transition
–40 100
ns
6
t113
t114
Receiver Data Jitter Tolerance
To Next Transition
For Paired Transitions
EOP Width: Must accept as EOP
–152 152
ns
–200 200
ns
670
—
ns
4
23-14
5
23-15
t115
Width of SE0 interval during differential
transition
—
210
ns
NOTES:
1. Full-speed Data Rate has minimum of 11.97 Mb/s and maximum of 12.03 Mb/s.
2. Driver output resistance under steady state drive is specified at 28 ohms at minimum and 43 ohms at
maximum.
3. Timing difference between the differential data signals.
4. Measured at crossover point of differential data signals.
5. Measured at 50% swing point of data signals.
6. Measured from last crossover point to 50% swing point of data line at leading edge of EOP.
7. Low-speed Data Rate has a minimum of 1.48 Mb/s and a maximum of 1.52 Mb/s.
8. Measured from 10% to 90% of the data signal.
Intel ^® ICH7 Family Datasheet
809