I was placing some components on PCB recently, and, being relatively new to the subject, there are still things I miss out in terms of knowledge even though I try to google every question that comes to my mind in terms of how to do things right and why.
While I found a pair of really helpful posts around here about bypassing and grounding, I still have a question to which I found no answer. At least, not in a way I tried to word it.
The bypassing rule "cap right to the pin" is simple enough, but I had situation when trace would approach the chip from under the chip, meaning I couldn't place bypass cap between power source and pin itself, I kind of have to make a fork from the pin (there is a known good option of placing bypass cap on the other side of the board right against the pin, but let's say I can't.) Bypassing guidelines gave me a lot of information, but didn't really cover my question.
Now, there is a post here, that's asking, as I see, exactly my thing, and while a pair of answers discuss it, I kind of don't see a definitive and confident answer that will say "It's totally OK" or "It's not recommended". At least nothing struck me as a confident and definitive answer for me to understand it once and for all. OK or not OK. And why, of course.
Question is: is this kind of placement OK or bad? I have a feeling it's not recommended purely intuitively (intuition feels trace inductance and extra path the noise have to make to go to the ground), but I only trust some hard proof and not my guts when it comes to scientific stuff. So I would want to know for sure and listen to the opinions of more experienced and professional people.
Edit 1: I'm talking about common low frequency circuit, where most stuff is kHz or a few MHz, maybe 100MHz as an absolute maximum for MCU, nothing more