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SN74LVC2G53: Not using the COM pin

Riley Huang
Prodigy 300 points
Part Number: SN74LVC2G53

Hi team, regards to sn74lvc2g53, I have 2 questions coming from my customer.

1.What the purpose is for the COM pin?

2.If not using the COM pin, how to deal with it, floating, pull high or pull low?

  • +1
    Guru 317370 points

    The A input selects whether Y1 or Y2 is connected to COM.

    It can be left floating, but then you could just as well remove the chip.

  • 0
    TI__Mastermind 35638 points

    Hey Riley,

    Just to double up on what Clemens said here, the COM pin is where the Y1 and Y2 will be connected to depending on the state of the A pin. If you aren't using the COM pin then the mux has no purpose so I'm willing to bet there is just some misunderstanding in either the functionality of the device or more likely a misunderstanding of what each individual pin is meant to be used for.

    I'd confirm with your customer that they understand the functionality as shown in the pin functions table on page 3 of the datasheet

    Thanks!
    Rami