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Converting 3.3V to 9V using CD4504B

Ricardo Almeida
Prodigy 10 points

Other Parts Discussed in Thread: CD4504B, ULN2003A, TPL7407L

I'd like to translating a 3.3V output coming from an I/O uC pin to 9v using the CD4504B. The 9v tip is to be connected to a JFET gate. The conversion is one way. I checked the IC datasheet and I can't find any info about the minimal voltage of the Vcc, I only found about the Vdd voltage bounds. Thus, my questions are: Can I use the CD4504B with Vcc powered with 3.3V and Vdd powered with 9V? Is this IC the recommended to do this job that I need?

  • 0
    TI__Expert 6430 points
    Move to logic forum.
  • 0
    TI__Genius 14487 points

    Ricardo,

    We apologize for the late reply. Since the CD4504B is a part we acquired from Harris, we do not have any characterization data on it. We also only guarantee what is in the datasheet. You could test it in your system at 3.3 V, but TI would not guarantee those operating conditions.

    One solution that might work well for you is to use the ULN2003A or the TPL7407L with resistors pulled up to 9 V on the output. One caution of this operation however, is that the ULN or TPL would act like an inverter. This means you would want to invert your uC signals in software to accomodate this operation.