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TMUX6219: Logic level high and low range confirmation

Rain Wang
Expert 1400 points
Part Number: TMUX6219
Other Parts Discussed in Thread: TS5A3159-EP, TS5A3159

Hi TI

1. When I use tmux6219 chip, I need ± 4.5V power supply. Since the critical value of power supply of this chip has been reached, I want to confirm the range of high and low logic level when ± 4.5V power supply is available? Chapter 6.12 in the datasheet only provides the logic level parameters at ± 5V;

2. If the power supply range can be lower and the function can cover the chip of tmux6219, please help recommend it. Thank you.

3. I can see that there are also Automotive grade chips for tmux6219 , but the temperature range is also - 40 ° ~ 125 °. Is there a similar enhanced chip that can pull the low temperature to - 55 °? If so, please help recommend, thank you.

   

  • 0
    Guru 276670 points

    ±4.5 V corresponds to a single 9 V supply; this is not yet critical.

    The control inputs work with 1.8 V or higher signals with all supplies.

    For a wider temperature range, use the TS5A3159-EP.

    What voltages do you need to switch?

  • 0 in reply to Clemens Ladisch
    Expert 1400 points

    Hi Clemens

         1. I need a switching voltage of 1.4V ~ 1.8V,  Is there a more suitable PN to recommend?

          2. TS5A3159-EP is EP PN，if have no EP but have a wider temperature range?

  • 0 in reply to Rain Wang
    Guru 276670 points

    The CD74HC4053B allows lower temperatures. It has worse characteristics; you could parallel the three channels to get lower on-resistance with higher capacitance.

  • 0 in reply to Rain Wang
    TI__Genius 10974 points

    Hi Rain,

    1) The datasheet actually specifies all the voltage ranges at +/-10% variation. So at the +/-5V rail, those datasheet parameters are valid for +/-4.5V and +/-5.5V as well, which specifies a minimum VIH at 1.3V and a maximum VIL at 0.8V.

    2) +/-4.5V is the lowest dual supply voltage the device can support. For single supply, it can work down to 4.5V (VDD only, VSS would be 0V).

    3) We do have several devices specified down to -55C. The TS5A3159-EP would be a good fit here as long as you have the voltage rail needed to switch 1.4-1.8V signals (in this case, since the TS5A3159 allows rail to rail switching, you would need at least a 1.8V supply).

    Let me know if you have any other questions on this.

    Thanks!

    Bryan