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SN74LV4051A: Is it a commonly used parts? How about the lead time and stock? vs new TMUX1208

user4788188
Prodigy 20 points
Part Number: SN74LV4051A
Other Parts Discussed in Thread: TMUX1208, , INA282, MUX36D08

My new project used SN74LV4051. Is it a commonly used parts? How about the lead time and stock?

  • 0
    TI__Mastermind 45350 points

    User4788188,

    You can see the lead time and stock on TI.com order now page or you can contact your distributor for more information.

    The SN74LV4051A is our oldest 1-channel 8:1 mux and the TMUX1208 is the newest.

    The TMUX1208 may save you design changes down the road as process voltage nodes decrease.  The Vdd min is much lower and the logic can be controlled with 1.8V. 

    Thank you,

    Adam

  • 0 in reply to Adam Torma
    Intellectual 700 points
    When will TMUX1208 be available? Would like to design it in now, but the uncertainty of the supply chain at the moment gives up pause.
  • 0 in reply to SteeVeeDee
    TI__Mastermind 45350 points
    SteeVeeDee,

    The TMUX1208 is available in sample quantities now that you can order from the TI store. How many will you need for production and by which date will you need them to arrive?

    Adam
  • 0 in reply to Adam Torma
    Intellectual 700 points
    We need a couple hundred in about 2 months...
  • 0 in reply to SteeVeeDee
    Intellectual 700 points
    Also, I should add we are interested in the QFN package, which doesn't appear to be available in the estore...
  • 0 in reply to SteeVeeDee
    TI__Mastermind 45350 points
    SteeVeeDee,

    We are manufacturing the TSSOP package first which you should be able to get production quantities you need soon. Unfortunately, the QFN version is releasing after the TSSOP and our current estimates are mid November time frame.

    What are you using the switch for in the system? Maybe we can find you an alternate device in a QFN package?

    Thank you,
    Adam
  • 0 in reply to Adam Torma
    Intellectual 700 points
    I will see if November will work; definitely would need some assurances there.

    It is being used to mux 8 different INA282 monitors.

    We can try to use the LV4051, but the TMUX1208 QFN package is smaller.

    This design was previously using the MUX36D08 to multiplex the signals to a single INA282, but its series impedance (~125 Ohms) is working against the rather low input impedance of the INA282 and causing about 4% error. While we might be able to compensate for or tolerate that, it looks like we'll just throw a bunch of INA282s at it and mux those outputs instead. Not very efficient parts wise, but eliminates these accuracy hits.