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SN74LV4051A: Digital input

Takashi Yamaguchi
Genius 11570 points
Part Number: SN74LV4051A
Other Parts Discussed in Thread: TMUX1308

Hi team,

My customer is considering to use the SN74LV4051A . They intend to input digital logic signal to this device. 

Does this device normally operate as an analog switch even with a signal of about 100uA? Is there a minimum operating current?

Regards,

Yamaguchi

  • 0
    Guru 258990 points

    An analog switch works without problem with digital signals.

    A closed switch behaves essentially like a resistor (see Ron). So if the current is very small, the voltage drop over the switch is very small.

  • 0
    TI__Expert 5660 points

    Hi Yamaguchi,

    TI's analog switches and multiplexers are passive devices that support analog and digital signals, as long as recommended operating conditions are met and absolute maximum ratings are not exceeded.

    Additionally, I recommend taking a look at one of our newer 8:1 muxes, such as TMUX1308, which comes in a small new package and offers upgraded features such as 1.8V logic compatibility, break-before-make, and fail-safe logic.

    Best regards,
    Kate