USB97CFDC Ver la hoja de datos (PDF) - SMSC -> Microchip
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USB97CFDC Datasheet PDF : 20 Pages
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USB AC PARAMETERS
Rise Time
CL
Differential
Data Lines
10%
90%
CL
tR
Fall Time
90%
10%
tF
Full Speed: 4 to 20ns at CL = 50pF
FIGURE 7 - DATA SIGNAL RISE AND FALL TIME
TPERIOD
Differential
Data Lines
Crossover
Points
Consecutive
Transitions
N * TPERIOD + TxJR1
Paired
Transitions
N * TPERIOD + TxJR2
FIGURE 8 - DIFFERENTIAL DATA JITTER
TPERIOD
Differential
Data Lines
Crossover
Point
Crossover
Point Extended
Diff. Data to
SE0 Skew
N * TPERIOD + TDEOP
Source EOP Width: TEOPT
Receiver EOP Width: TEOPR1, TEOPR2
FIGURE 9 - DIFFERENTIAL TO EOP TRANSITION SKEW AND EOP WIDTH
TPERIOD
Differential
Data Lines
TJR
TJR1
TJR2
Consecutive
Transitions
N * TPERIOD + TJR1
Paired
Transitions
N * TPERIOD + TJR2
FIGURE 10 - RECEIVER JITTER TOLERANCE
SMSC DS – USB97CFDC
Page 16
Rev. 12/15/2000
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