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74ACT1284 датащи(PDF) 5 Page - STMicroelectronics |
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74ACT1284 датащи(HTML) 5 Page - STMicroelectronics |
5 / 11 page 74ACT1284 5/11 TEST CIRCUIT CL = 50 pF or equivalent (includes jig and probe capacitance) RT =ZOUT of pulse generator (typically 50Ω) Figure 1 : Propagation Delay Time TEST S1 S2 S2 tPHL (A1-A7 to B1-B7) RL =62Ω, R1 =33Ω (see waveform 1) OPEN VCC VCC tPLH (A1-A7 to B1-B7) RL =62Ω (see waveform 1) CLOSED GND GND tPHL,tPLH (B1-B4 to A1-A4) RL = 500Ω (see waveform 2) CLOSED GND GND tr,tf (A1-A7 to B1-B7) RL =500Ω (see waveform 1) CLOSED VCC VCC tEN (HD to B1-B7) RL =62Ω, R1 =33Ω (see waveform 3) OPEN GND GND tDIS (HD to B1-B7) RL =62Ω (see waveform 3) CLOSED GND GND |
Аналогичный номер детали - 74ACT1284 |
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Аналогичное описание - 74ACT1284 |
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