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PDIUSBH11AD 数据表(PDF) 21 Page - NXP Semiconductors |
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PDIUSBH11AD 数据表(HTML) 21 Page - NXP Semiconductors |
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21 / 28 page  Philips Semiconductors Product specification PDIUSBH11A Universal Serial Bus Hub 1999 Jul 22 21 SV00837 tPERIOD DIFFERENTIAL DATA LINES CROSSOVER POINT CROSSOVER POINT EXTENDED DIFFERENTIAL DATA TO SEO/EOP SKEW N * tPERIOD + tDEOP SOURCE EOP WIDTH: tEOPT RECEIVER EOP WIDTH: tEOPR1, tEOPR2 Figure 1. Differential data to EOP transition skew and EOP width CROSSOVER POINT CROSSOVER POINT CROSSOVER POINT SV00514 CROSSOVER POINT Hub Delay Downstream tHDD Hub Delay Upstream tHDD DOWNSTREAM DIFFERENTIAL DATA UPSTREAM- DIFFERENTIAL DATA UPSTREAM DIFFERENTIAL DATA DOWNSTREAM- DIFFERENTIAL DATA VDD VSS VSS A. DOWNSTREAM HUB DELAY B. UPSTREAM HUB DELAY SOP DISTORTION tSOP = tHDD(SOP) – tHDD (NEXT J) LOW SPEED TIMINGS ARE DETERMINED IN THE SAME WAY FOR: tLHDD AND tLSOP Figure 2. Hub Differential Data Delay and SOP distortion |
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