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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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74LVC245A 数据表(PDF) 5 Page - STMicroelectronics |
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74LVC245A 数据表(HTML) 5 Page - STMicroelectronics |
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5 / 12 page  74LVC245A 5/12 Figure 3: Test Circuit RT = ZOUT of pulse generator (typically 50Ω) Table 10: Test Circuit And Waveform Symbol Value Figure 4: Waveform - Propagation Delays (f=1MHz; 50% duty cycle) Symbol VCC 1.65 to 1.95V 2.3 to 2.7V 2.7V 3.0 to 3.6V CL 30pF 30pF 50pF 50pF RL = R1 1000 Ω 500 Ω 500 Ω 500 Ω VS 2 x VCC 2 x VCC 6V 6V VIH VCC VCC 2.7V 2.7V VM VCC/2 VCC/2 1.5V 1.5V VOH VCC VCC 3.0V 3.0V VX VOL + 0.15V VOL + 0.15V VOL + 0.3V VOL + 0.3V VY VOH - 0.15V VOH - 0.15V VOH - 0.3V VOH - 0.3V tr = tr <2.0ns <2.0ns <2.5ns <2.5ns |
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