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SN74AHCT1G04: Overshoot max,Undershoot max,Rise & Fall time,Duty cycle,Non-monotonicity values

Ray Vincent Aranzaso
Genius 15985 points
Part Number: SN74AHCT1G04

Hi,

Good Day. I have a customer who is working with SN74AHCT1G04. Please see his query below for your reference. Thank you very much.

Customer needs the values of overshoot max, undershoot max, rise & fall time, duty cycle, voltage swing, non-monotonicity of SN74AHCT1G04DBVT

Best Regards,

Ray Vincent

  • 0
    Guru 280090 points

    The maximum allowed undershoot is 0.5 V, overshoot, 1.5 V (= 7 V − 5.5 V); see the absolute maximum ratings.

    Rise/fall time are limited by Δt/Δv in the recommended operating conditions. This limit applies to any part of the edge between VIL and VIH, so the rise or fall must be monotonic.

    With a load of 15 pF, the maximum output frequency is 85 Mhz (170 Mbps) .

    What exactly is meant with "duty cycle" and "voltage swing"?

  • 0 in reply to Clemens Ladisch
    TI__Genius 15985 points

    Hi Clemens,

    Good Day. Since there is a rise time and fall time in the device, customer also ask the duty cycle. For the voltage swing, the difference of the maximum output voltage and minimum output voltage I think.

    Best Regards,

    Ray Vincent

  • 0 in reply to Ray Vincent Aranzaso
    TI__Guru* 96842 points
    Ray Vincent Aranzaso said:
    Since there is a rise time and fall time in the device, customer also ask the duty cycle. For the voltage swing, the difference of the maximum output voltage and minimum output voltage I think.

    Hi Ray,

    Duty cycle is dependent on the input signal - there is no limitation on duty cycle for a logic inverter.

    Similarly, "voltage swing" is dependent on the selected supply voltage. For example, at 3.3V supply, the output can be 0V or 3.3V -- not including any ringing that may exceed these values.

    None of these are specifications that we test or characterize.

    Perhaps it would be easier if you told us what your customer is trying to achieve with the device, and we could make recommendations based on that?

  • 0 in reply to Emrys Maier
    TI__Genius 15985 points

    Hi Emrys,

    Good Day. Another question came from our customer. Please see below for your reference. Thank you very much.

    "How do I create and download "Release" code as opposed to "Debug" code using the IAR IDE?"

    Best Regards,

    Ray Vincent

  • 0 in reply to Ray Vincent Aranzaso
    TI__Genius 15985 points

    Hi Emrys,

    Good Day. Please disregard my response earlier. Anyways thanks for the clarifications. I will tell this to our customer. Thank you very much.

    Best Regards,

    Ray Vincent