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ST70137 数据表(PDF) 19 Page - STMicroelectronics |
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ST70137 数据表(HTML) 19 Page - STMicroelectronics |
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19 / 22 page ![]() ST70137 19/22 USB Interface AC Specifications (1.1 version) AC Characteristics (D+, D-) USB Test Scheme Symbol Parameter Test Conditio n Minimum Typical Maximum Units tDR Average bit rate (12 M/s ±0.05%) 11.97 12.03 Mbps tR Rise Time between 10% and 90% (see Figure Rise and Fall Time Measures) 420 ns tF Fall Time 10% and 90% (see Figure Rise and Fall Time Measures) 420 ns VCRS Output Signal Crossover Voltage 1.3 2 V CLK Th Input Output Tri-state Output Tsu Tval Ton Toff 1 2 Test 50pF 50pF Test |
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