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I realize that VO is different on both lines 4. What determines which of the 2 lines different lines of values I’ll get? What am I missing? The table is trying to summarize daatsheet that would really best be shown as a graph.
If you draw 0. Note that the causal relationship implied by the table is that if you need a guarantee that the part will output 4.
Depending upon how the output is used, it may be more helpful to know how much current may be drawn without reducing the output too much, or to know how much the output will sag when a certain amount of current is drawn. In many cases, a data sheet will include a graph which shows the relationship between output voltage and current.
Unfortunately, such graphs often only plot typical performance curves rather than guaranteed ones and would thus not be able to authoritatively answer a question like “If the output needs to stay above 2. Unfortunately, the fact that one batch of chips matches the “typical” performance specifications does not imply that future batches of chips will continue to do so. Some nice data sheets have a graph with multiple curves, including guaranteed maxima and minima. In such cases it may be possible to determine that a particular combination of constraints like the above could certainly be met, or in some cases determine that e.
CD4075 Triple 3-input OR Gate
The specification is letting you know how much current the output can provide. If you try to draw more current the output voltage will drop.
symbology interpretation in the datasheet – Electrical Engineering Stack Exchange
datasyeet Home Questions Tags Users Unanswered. Null 4, 10 22 Leandro Nogueira Couto 18 4. I think my problem is with that causal relationship. Isn’t the voltage usually fixed and the current depends on the resistance on the pin? Why would drawing a higher current cause a drop in voltage?
I think the problem is oversimplified in my mind. Since the transistors in most chips aren’t superconductors, drawing current through them causes a voltage drop which generally increases, though often not linearly, with the amount of current drawn.
Datsaheet causal relationship on the datasheets is as I described: Perhaps your confusion stems from the fact that a higher voltage drop reduces pin voltage? Barry 9, 1 14 Or conversely, if you drop the output voltage to 2. But isn’t the output voltage determined solely by VDD and the logic level of the output pin? When the output current increases, current flowing through that circuitry experiences a voltage drop.