82C862 Datasheet, PDF (48/51 Pages) List of Unclassifed Manufacturers – FireLink USB Dual Controller Quad Port USB

FireLink USB
82C862
6.3.3 USB AC Timings: Low Speed Source
Sym
Parameter
Min Max
Unit Figure Condition (Notes 1, 2, and 4)
Driver Characteristics
Transition Time:
tR
Rise Time
tF
Fall Time
75
300
ns
75
300
ns
Notes 5 and 6
Min# measured with: CL = 50pF
Max# measured with: CL = 350pF
tRFM
Rise/Fall Time Matching
80
120
%
(tR/tF)
vCRS
Output Signal Crossover Voltage
1.3
2.0
V
Data Source Timings
tDRATE Low Speed Data Rate
1.4775 1.5225 Mb/s
Average bit rate = 1.5Mb/s ±1.5%
tDDJ1
tDDJ2
Source Differential Driver Jitter,
At Host (Downstream):
To Next Transition
For Paired Transitions
–75
75
ns
–45
45
ns
Notes 7 and 8
tUDJ1
tUDJ2
Source Differential Driver Jitter,
At Function (Upstream):
To Next Transition
For Paired Transitions
–95
95
ns
–150 150 ns
Notes 7 and 8
tEOPT Source EOP Width
1.25 150 µs
6-5 Note 8
tDEOP Differential to EOP Transition Skew –40 100 ns
6-5 Note 8
tUJR1
tUJR2
Receiver Data Jitter Tolerance,
At Host (Upstream):
To Next Transition
For Paired Transitions
6-6
–152 152 ns
–200 200 ns
tDJR1
tDJR2
Receiver Data Jitter Tolerance,
At Function (Downstream):
To Next Transition
For Paired Transitions
6-6
–75
75
ns
–45
45
ns
EOP Width at Receiver:
6-6 Note 8
tEOPR1
Must Reject at EOP
330
ns
tEOPR2
Must Accept as EOP
675
ns
Notes: 1. All voltages measured from the local ground potential, unless otherwise specified.
2. All timings use a capacitive load (CL) to ground of 50pF, unless otherwise specified.
3. Full speed timings have a 1.5 kohm pull-up to 2.8V on the D+ data line.
4. Low speed timings have a 1.5 kohm pull-up to 2.8V on the D– line.
5. Measured from 10% to 90% of the data signal.
6. The rising and falling edges should be smoothly transitioning (monotonic).
7. Timing difference between the differential data signals.
8. Measured at crossover point of differential data signals.
9. The maximum load specification is the maximum effective capacitive load allowed that meets the target hub Vbus
droop of 330mV.
®
Page 44
912-2000-030
Revision: 1.0