I am confused about 2 different articles about decoupling capacitors and usb filtering.
First one: https://www.autodesk.com/products/eagle/blog/what-are-decoupling-capacitors/
this says i should use 2 different decoupling capacitors for each ic. One for high frequency(0.1 uf) and one for low frequency(10uF) noise. This makes great sense.
The second one is about usb voltage filtering. http://andybrown.me.uk/2015/07/24/usb-filtering/
This article says "It’s a little known fact that the USB 2.0 standard mandates a maximum of 10µF in parallel with VUSB to limit the inrush current"
So the problem is, i have 3 ics. with each has 10 uF in parallel i get way more impedance between 5V and gnd since they're all parallel between 5v-gnd.
Is using only 1 piece of 10uF at the end of filter instead of placing 3 pieces 10uF for each ic enough?
Edit: One ic is pca9555 nxp.com/docs/en/data-sheet/PCA9555.pdf? (could not seea cap value on this) other is mcp2221A ww1.microchip.com/downloads/en/DeviceDoc/20005565B.pdf