The constant time value for an electronic device
Datasheets may tell you these times.
Temperature will affect the &quot;time&quot;.
The amount of wiring, which stores Electric Charge just like clouds store charge before lightning occurs, will affect the &quot;time&quot;.
The use of proper or improper voltages, needed to allow successful internal operation, will affect the &quot;time&quot;.
And variations during production, as the silk_screen style of manufacturing has variations in alignment as various layers are placed, as thicknesses of the layers vary, etc etc all affect the speed of the internal transistors and thus affect the &quot;time&quot;.
Go examine the &quot;datasheet 74LS04&quot; and then the &quot;datasheet 74LS00&quot; and then the &quot;datasheet 74LS74&quot; and then the &quot;datasheet 74LS181&quot; and then the &quot;datasheet 74LS244&quot;, as important devices with &quot;times&quot; that vary dependent on the complexity of internal transistors and logical operations.
=================================
For the 5 devices I've mentioned, the &quot;times&quot; will be 5 nanoSeconds to 80 nanoSeconds, depending on the Power Voltage, the Wiring, the Temperature, and the complexity (the 74LS181 is the most complex).
A nanosecond is about how much &quot;time&quot; required by light (photons) to travel 1 foot (or 30 centimeters).
These 5 devices are 1mm to 2mm in size, and the internal transistors need &quot;time&quot; for their own changing. You can examine the 74LS181, perhaps the complete path from Cin to Cout, and count the logic gates which each contribute delays.
By the way, the 5 devices I've named are nearly all you need to make a computer. You will need to provide a substantial memory (static RAM has its own &quot;time&quot; requirements.)