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4th September 2019, 19:58 #1
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Calculate the load capacitance in oscillators

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10th September 2019, 18:03 #2
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Re: Calculate the load capacitance in oscillators
Is it even possible to calculate the load capacitance from this?

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10th September 2019, 23:33 #3
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Re: Calculate the load capacitance in oscillators
Each logic gate has some resistance in its output stage. This means it can provide (source) limited amount of current to the load. Your capacitor load tries to draw maximum current for the time it takes to charge. Probably in the low mA range, seeing this discussion:
http://forum.allaboutcircuits.com/th...4lsttl.84712/
In addition it makes a difference whether your capacitor is discharging since then the IC must sink current coming back through its output stage.
Small C value rapidly charges and discharges, so the IC probably won't be terribly stressed. Large C value takes a longer time to charge so it draws current for a longer time. It won't necessarily destroy your IC but to be safe you should install a resistor to limit current.
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