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PC74HC11 PC74HC11 PC74HC11 Datasheet
Notes : 1. VIH (max) = 5.6V AC.The overshoot voltage duration is i 3ns. 2. VIL (min) = -2.OV AC. The undershoot voltage duration is i 3ns. 3. Any input OV i VIN i VDDa. Input leakage currents include Hi-Z output leakage for all bi-directional buffers with Tri-State outputs
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Designing for Interna I Feedback Mode For a 3kHz PWM control signal use a lpF low-leakage ceramic capacitor for C6. For applications requiring a hig her-frequency PWM control sig nal, reduce the value of C6 to between lpF and 0.22}_,F for frequencies between 3kHz and 12kHz. Higher C6 values reduce output ripple. In Figure 2, VOUT is governed by the fol- lowing equation:
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l Cycle Time 12 15 20 25 30 ns
I Operation (max) 190 170 140 130 120 mA


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