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SN74AHCT1G04: Is it Possiable to use a Inverting buffer/driver like SN74AHCT1G04 with 5V Power supply, 3.3V Sinewave input, to generate a inverted 5V Sinewave in Output Y ?

Julia Ju
Intellectual 360 points
Part Number: SN74AHCT1G04

Dear

when using an active crystal oscillator to output an 3.3V Sinewave, we want to change the 3.3V Sinewave to 5V sinewave.

Is it OK to use a  Inverting buffer/driver like SN74AHCT1G04 with 5V Power supply, 3.3V Sinewave input, to generate a inverted 5V Sinewave in Output Y ?

When powered with 5V, the output waveform is 5V? or 3.3V ?

Thanks!

  • 0
    Guru 223820 points

    The digital output is either high or low; you will not get a sine wave.

    To amplify a sinve wave, use an op amp. What frequency do you need?

  • 0
    TI__Genius 12690 points

    Hi Julia,

    The SN74AHCT1G04 device is a digital buffer which outputs a square wave. With a voltage supply of 5V, the output will be 5V and will also be inverted however the waveform will not be sinusoidal. The output's higher frequencies could be filtered to produce an output waveform that is sinusoidal. Is this what you are looking for?

    You can also use an op-amp device to amplify an analog signal. 

  • 0 in reply to Sebastian Muriel
    Intellectual 360 points

    Dear Sebastian

    Yes, an amp can finally realize this.

    But is there any one GATE IC can do this?

    The crystal oscillator power voltage is 3.3V, outout is 80MHZ Sinewave signal; we want to convert it to 5V 80Mhz Sinewave signal, to power for the Protocol chip, (the Protocol chip is powered by 5V )

     thanks！

  • 0 in reply to Julia Ju
    Guru 223820 points

    Why does the waveform of a 80 MHz signal matter? What is the exact model of that protocol chip?

  • +1 in reply to Julia Ju
    TI__Genius 12690 points

    Gates will only output square wave so there is not one Gate IC that can do this. You would need a passive filter at the output to achieve a sinusoidal output waveform with a gate. A device with a Schmitt trigger input which allows a sine wave input would also be needed because standard CMOS devices cannot have slow rising and falling edges.