Rainbow-electronics W90P710CDG Manual de usuario Pagina 519

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W90P710CD/W90P710CDG
- 520 -
7.3.3 USB Transceiver AC Characteristics
Low Speed: 75ns at C
L
= 50pF, 300ns at C
L
= 350pFFull Speed: 4 to 20ns at C
L
= 50pF
Differential
Data Lines
10
%
Rise Time
90
%
Fall Time
t
F
t
R
10
%
90
%
C
L
C
L
Data Signal Rise and Fall Time
USB Transceiver AC Characteristics
SYMBOL DESCRIPTION CONDITIONS MIN MAX UNIT
T
R
Rise Time CL = 50 pF 4 20 ns
T
F
Fall Time CL = 50 pF 4 20 ns
T
RFM
Rise/Fall Time Matching 90 110 %
T
DRATE
Full Speed Data Rate
Average bit rate
(12 Mb/s ± 0.25%)
11.97 12.03 Mbps
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