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MUX506: Clarification on Selection Pins for MUX506IPWR

Manikandan Velayudham
Prodigy 80 points
Part Number: MUX506

Tool/software:

Hi Experts, 


I’m planning to use the MUX506IPWR in our application to switch a single input to 16 outputs. I have a few questions regarding the selection pins for this MUX. Specifically, is it possible to short all the selection pins together and provide a single logic signal (either high or low) to control the switching of the MUX? My intention is to switch half of the channels at a time, and since I have a limited number of GPIO pins on my MCU, I’d like to confirm if this setup is feasible.

Looking forward to your insights.

Thank you!

  • 0
    TI__Mastermind 35218 points

    Hi Manikandan,

    Short answer, yes you can tie your control pins together, not problem.

    To go a bit further, I'm not sure why you would use this device in that manner though. It seems you would only have 2 discreet possibilities for selecting channels 0000, 1111. So yo would just be switching between channel 1 and channel 16. Why not select a 2:1 mux instead? 

    Your statement about switching half the channels at a time makes me think that maybe there is a gap though in the understanding of how this device works. You wouldn't be switching half of the channels together this way. You would limit yourself to only being able to select 2 out of the 16 channels and the other 14 would never be selected. 
    I'm thinking you may be under the impression this a 16 channel 1:1 device rather than a 1ch 16:1 device. 

    Can you give me a more precise description of what you're trying to do so I can try and provide a better solution? 

    Thanks,
    Rami