I’m trying to figure out the voltage drop and the current used by a Johnson counter from a data sheet and am feeling a little lost.
In particular I’m looking at a CD4022B from TI.
I’m looking at the static electrical characteristics on page 3. I’m getting confused as to the relationship between Vo, Vin, and Vdd.
In hooking up the IC I’m assuming Vss is the input voltage, Vdd is the GND, and Vout is what is outputted through the decoded outputs (0-9).
I’m also a little lost on the different output and input states listed. I’m assuming the Output High (source) current Ioh is referring to when one of the decoded outputs is high, and that the Output Low (sink) current Iol is referring to current draw by the IC when the decoded outputs are low.
I’m also assuming right now that Vol are also referencing the decoded outputs, and Vil is referencing Vss, but I’m guessing that assumption is wrong simply based on what the numbers are.
Any help would be great in figuring this out. Thanks.