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Original question:

CD74HCT4051: CD74HCT4051

CD74HCT4051: Can it work at 3.3Vin?

Jayden Qiu
Intellectual 1405 points
Part Number: CD74HCT4051
Other Parts Discussed in Thread: SN74LV4051A

Tool/software:

Hi team,

This is Jayden, the data sheet of CD74HCT4051 requires a power supply voltage of 4.5~5.5V. Can it work at 3.3V (±5%)?  If so, what problems will there be and what indicator changes should I pay attention to? Many thanks.

Brs

Jayden

  • 0
    Guru 316440 points

    This is neither tested nor guaranteed to work at all.

    I suspect that the control input switching thresholds will have much less noise margin, and that the on-resistance is similar to that of the HC at 3.3 V. But again, there is no guarantee.

  • 0
    TI__Mastermind 35168 points

    Hi Jayden,

    If your supply is 3.3V you may not be able to turn the switch on fully. Like Clemens said, it's not tested or guaranteed so we can't provide a definitive answer. SN74LV4051A may be an alternative option here.

    Thanks,
    Rami