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USB97C102 датащи(PDF) 72 Page - SMSC Corporation |
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USB97C102 датащи(HTML) 72 Page - SMSC Corporation |
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72 / 80 page ![]() SMSC DS – USB97C102 Page 72 Rev. 03/23/2000 Differential Data Lines Paired Transitions N * TPERIOD + TJR2 TPERIOD Consecutive Transitions N * TPERIOD + TJR1 TJR TJR1 TJR2 FIGURE 14 - RECEIVER JITTER TOLERANCE Table 121 - Full Speed (12Mbps) Source Electrical Characteristics PARAMETER SYM CONDITIONS (NOTE 1, 2, 3) MIN TYP MAX UNIT DRIVER CHARACTERISTICS: Transition Time: Rise Time Fall Time TR TF Note 4,5 and FIGURE 10 CL = 50 pF CL = 50 pF 4 4 20 20 ns ns Rise/Fall Time Matching TRFM (TR/TF) 90 110 % Output Signal Crossover Voltage VCRS 1.3 2.0 V Drive Output Resistance ZDRV Steady State Drive 28 43 $ DATA SOURCE TIMING: Full Speed Data Rate TDRATE Ave. Bit Rate (12 Mb/s +/- 0.25%) Note 8 11.95 12.03 Mbs Frame Interval TFRAME 1.0 ms +/- 0.05% 0.9995 1.00 05 ms Clock Period TPERIOD 80 86 ns Source Differential Driver Jitter To next Transition For Paired Transitions TDJ1 TDJ2 Note 6, 7 and FIGURE 12 -3.5 -4.0 3.5 4.0 ns ns Source EOP Width TEOPT Note 7 and FIGURE 13 160 175 ns Differential to EOP transition Skew TDEOP Note 7 and FIGURE 13 -2 5 ns Receiver Data Jitter Tolerance To next Transition For Paired Transitions TJR1 TJR2 Note 7 and FIGURE 14 -18.5 -9 18.5 9.0 ns ns Differential Data Jitter To next Transition For Paired Transitions TXJR1 TXJR2 Note 7 and FIGURE 12 -18.5 -9 18.5 9.0 ns ns EOP Width at receiver Must reject as EOP Must Accept TEOPR1 TEOPR2 Note 7 and FIGURE 13 40 82 ns ns |
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