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USB97C102 датащи(PDF) 71 Page - SMSC Corporation |
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USB97C102 датащи(HTML) 71 Page - SMSC Corporation |
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71 / 80 page ![]() SMSC DS – USB97C102 Page 71 Rev. 03/23/2000 USB AC PARAMETERS Full Speed: 4 to 20ns at CL = 50pF Differential Data Lines 10% Rise Time 90% Fall Time tF tR 10% 90% CL CL FIGURE 10 - DATA SIGNAL RISE AND FALL TIME Data Line Crossover Point 50% Point of Initial Swing VSS VSS Driver End of Cable Round Trip Cable Delay 80ns (max) Receiver End of Cable One Way Cable Delay 30ns (max) FIGURE 11 - CABLE DELAY TPERIOD Differential Data Lines Crossover Points Paired Transitions N * TPERIOD + TxJR2 Consecutive Transitions N * TPERIOD + TxJR1 FIGURE 12 - DIFFERENTIAL DATA JITTER TPERIOD Differential Data Lines Crossover Point Crossover Point Extended Source EOP Width: TEOPT Receiver EOP Width: TEOPR1, TEOPR2 Diff. Data to SE0 Skew N * TPERIOD + TDEOP FIGURE 13 - DIFFERENTIAL TO EOP TRANSITION SKEW AND EOP WIDTH |
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