I have these ICs
and I want to wire them like the sparkfun 16:1 mux breakout board.
Here is what I have so far. Is this correct?
However I feel like these are not the same as the actual ICs. Also another quick question, how many of Mux can I daisy chain?
Thanks in advance 😀
Best Answer
Looks fine to me. Another option would be to share the COM pins and drive EN on the multiplexers to read from one at a time, but what you have is fine.
The Sparkfun breakout boards you're referring to are essentially "pure" breakouts. The only additional things on the breakout board are:
A pulldown resistor on the EN pin, which is unnecessary if you're driving that pin, and
A decoupling capacitor on VCC, which you should have in your circuit as well. (Just connect a small ceramic capacitor between the VCC and GND pins on each IC -- 0.1 µF is about right.)
Plenty. :) You'll run out of input pins on the Teensy long before you hit any fundamental limitations of the multiplexer.