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SN74HCT273: SN74HCT273

Fitra Neni Olya
Prodigy 90 points
Part Number: SN74HCT273

Hi TI Team,

I am Neni Olya from TEC Indonesia.

I want to confirmation about data sheet for that part number,

special for page 3/11

on the datasheet indicate is ns, it is true?

I need this data to support my company job,

thank you for reply

best regards,

neni olya

  • 0
    TI__Guru* 97046 points

    Hello Neni,

    Yes, ns is correct, however I am uncertain as to whether this spec is indicating a "per Volt" value or a total transition time.  Typically our datasheets list "Input transition rise/fall rate" and it is measured in ns/V.

    The large value (500 ns) leads me to believe that this may be a maximum total transition time specification instead.

    My recommendation for your current design would be to maintain inputs at 500 ns transition time or faster.  CMOS devices don't tend to work very well with slow edges, so the faster, the better.

  • 0 in reply to Emrys Maier
    Prodigy 90 points

    Hello Emrys,

    Thank you for fast respond,

    Actually I want to confirmation that value mean 500ns or 500 ns/V .
    I need actually condition value and indicate to document support my job,
    i can not continue to design caused unclear indicate,

    can you help me to make sure for indicate ?
    sorry many asking and request

    thank you

    regards,

    neni olya

  • 0 in reply to Fitra Neni Olya
    TI__Guru* 97046 points
    Hi Neni,
    It took me a little while to find the answer.

    The correct value is 500ns.

    This spec should be called "Input transition time" and due to a recent (within the last 3 years) format change in our datasheets, the name has changed and is incorrect in most of the HC family datasheets. We have a project ongoing to update these errors, but you may not see updated versions for 3 to 6 months.