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CD4013B: Input hysteresis

user4109590
Prodigy 180 points
Part Number: CD4013B
Other Parts Discussed in Thread: CD40106B

Hello E2E Logic Forum Members,

I have a question. Does CD4013B have an input hysteresis characteristics ?

If it is yes, would you please let me know the voltage width ?

Of course, I understand this device doesn't have spec of input hysteresis in the datasheet.

For example... I think this is describing a natural hysteresis.

Advanced High-Speed CMOS (AHC) Logic Family (SCAA034C) Page 11.

Input hysteresis of typically 150 mV is included in AHC devices (300 mV in AHCT devices),

Thanks,

Yasu

  • 0
    TI__Guru* 96712 points
    Hi Yasu,
    You are correct that some of our newer logic families do have some hysteresis built in, however the CD4013B is a member of the CD4K logic family, which is fairly old and does not have in-built hysteresis. (those families that do will typically have a note on the front page of the datasheet indicating hysteresis)

    There is a CD4K schmitt trigger inverter that you can use to add hysteresis to the device if needed, the CD40106B. If you can tell me about what you are trying to do, I might be able to suggest a good replacement part.
  • 0 in reply to Emrys Maier
    Prodigy 180 points

    Hello Emrys-san,

    Thanks for your quick reply!

    Our customer has input a very slow transition to Clock pin of this device, and it caused malfunction.
    So I suggested to input fast transition. As the results, this issue was cleared.

    Thanks,

    Yasu