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MC74LCX74 Datasheet(PDF) 6 Page - ON Semiconductor |
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MC74LCX74 Datasheet(HTML) 6 Page - ON Semiconductor |
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6 / 8 page 
MC74LCX74 http://onsemi.com 6 WAVEFORM 4 − PULSE WIDTH tR = tF = 2.5 ns (or fast as required) from 10% to 90%; Output requirements: VOL ≤ 0.8 V, VOH ≥ 2.0 V Vcc 0 V Vcc 0 V Vmi Vmi tw Vmi Vmi tw CPn SDn, CDn, CPn trec WAVEFORM 3 − RECOVERY TIME tR = tF = 2.5 ns from 10% to 90%; f = 1 MHz; tw = 500 ns Vcc 0 V Vcc 0 V Vmi Vmi SDn, CDn CPn tw Vcc Symbol 3.3 V + 0.3 V 2.7 V 2.5 V + 0.2 V Vmi 1.5 V 1.5 V Vcc/2 Vmo 1.5 V 1.5 V Vcc/2 Figure 3. AC Waveforms (Continued) PULSE GENERATOR RT DUT VCC RL CL CL = 50 pF at VCC = 3.3 + 0.3 V or equivalent (includes jig and probe capacitance) CL = 30 pF at VCC = 2.5 + 0.2 V or equivalent (includes jig and probe capacitance) RL = R1 = 500 W or equivalent RT = ZOUT of pulse generator (typically 50 W) Figure 4. Test Circuit |
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