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TMUX1574: max on resistance

Yuta Nishie
Genius 3760 points
Part Number: TMUX1574
Other Parts Discussed in Thread: TS3A44159

Hi,

Could you tell me what is the maximum value of On resistance when VDD=3.3V and VS=1.8V or 3V?

I think Figure 3 shows the Typ value, so I would like a graph of the maximum value.

Best Regards,

Nishie

  • +1
    Guru 286620 points

    The maximum resistance is at the highest VS, so in your case, the guaranteed theoretical maximum is somewhat less than 4.5 Ω.

    Alternatively, take the factor between the specified typical and maximum (2 Ω vs. 4.5 Ω), and apply it to the typical value shown in figure 3.

  • +1
    TI__Genius 10552 points

    Hi Nishie-san,

    Clemens is correct here suggesting the 4.5 Ohms value. If we take a look at the 1.5V - 5.5V characteristics, we can see that the max is 4.5 Ohms for Vdd in this window with Vs anywhere from 0 - Vddx2. With your specific application, you could expect just under 4.5 Ohms (somewhere in the range of 4 to 4.5)

    Thanks!

    Alex

  • 0 in reply to Alex Vish
    Genius 3760 points

    Hi Clemens-san, Alex-san,

    Thank you for your support.

    I understand Max On resistance under 4.5 Ohms (somewhere in the range of 4 to 4.5).

    Other than the TS3A44159, are there any devices with a maximum on-resistance of 3 ohms or less (@VDD=3.3 V, VS=1.8 V or 3 V)?

    The customer is looking for an alternative to the FSA2567MPX and needs a maximum on-resistance of 3 ohms or less.

    Best Regards,

    Nishie

  • +1 in reply to Yuta Nishie
    Guru 286620 points

    As far as I can see, the TS3A44159 is the only choice.