82801FB Datasheet, PDF (751/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

Electrical Characteristics
Table 22-15. Universal Serial Bus Timing
Sym
Parameter
Min Max
Full-speed Source¹
t100 USBPx+, USBPx- Driver Rise Time
4
20
t101 USBPx+, USBPx- Driver Fall Time
4
20
Source Differential Driver Jitter
t102 To Next Transition
For Paired Transitions
–3.5 3.5
–4
4
t103 Source SE0 interval of EOP
160 175
t104
Source Jitter for Differential Transition to SE0
Transition
–2
5
Receiver Data Jitter Tolerance
t105 To Next Transition
For Paired Transitions
–18.5 18.5
–9
9
t106 EOP Width: Must accept as EOP
82
–
t107
Width of SE0 interval during differential
transition
–
14
Low-speed Source⁷
t108 USBPx+, USBPx – Driver Rise Time
75
300
t109 USBPx+, USBPx – Driver Fall Time
75
300
Source Differential Driver Jitter
t110 To Next Transition
For Paired Transitions
–25
25
–14
14
t111 Source SE0 interval of EOP
1.25 1.50
t112
Source Jitter for Differential Transition to SE0
Transition
–40
100
Receiver Data Jitter Tolerance
t113 To Next Transition
For Paired Transitions
–152 152
–200 200
t114 EOP Width: Must accept as EOP
670
–
t115
Width of SE0 interval during differential
transition
–
210
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
ns
ns
ns
ns
ns
Fig
Notes
22-13
22-13
2, CL = 50 pF
2, CL = 50 pF
22-14
3, 4
22-15
5
6
22-14
4
22-15
5
22-13
22-13
2, 8
CL = 50 pF
CL = 350 pF
2,8
CL = 50 pF
CL = 350 pF
22-14
3, 4
22-15
5
6
22-14
4
22-15
5
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^® I/O Controller Hub 6 (ICH6) Family Datasheet
751