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SN7404: SN7404N: ESD information

Franz Figueroa32
Intellectual 2660 points
Part Number: SN7404

Hi E2E,

Good day!

Checking on the Qualification Summary of SN7404N, it states to the datasheet for the ESD information. However, no ESD information is included on the datasheet. Can you please provide.

Thank you in advance.

Best regards,

Franz Figueroa
Texas Instruments

  • 0
    TI__Guru* 96591 points

    Hi Franz,
    The SN7404 is part of the very first logic family to ever be created -- way back in the 1960's. These devices do not have any extra features, including added ESD protection.

    There are many other options for hex inverters that are more modern and offer ESD protection. Can you tell me why the SN7404 was selected?

    ** Corrected 4/8/2019 by Emrys Maier. These devices do have minimal ESD protection, see below response. **

  • 0 in reply to Emrys Maier
    TI__Intellectual 2660 points
    Hi Emrys,

    Thank you for answering. I have no further information regarding the part selection.

    As a follow-up question, since this device has no ESD protection, what would be the ESD category level of this part?

    Best Regards,

    Franz Figueroa
    Texas Instruments
  • 0 in reply to Franz Figueroa32
    TI__Guru* 96591 points
    Hi Franz,
    What ESD category system are you using? Please refer me to a specific regulation if you can.

    The majority of standard logic parts are rated only for manufacturing (2kV HBM). We _always_ recommend using external ESD protection for system-level applications, with the exception of a few parts that list system level ratings.

    I would think any customer using a 60 year old part would understand the concept that ESD protection wasn't even considered yet when they were designed. We have many options available that do have ESD ratings and we even offer system-level protection ESD devices separately.
  • 0
    TI__Guru* 96591 points
    Hi Franz,
    It seems that my initial response was incorrect. Apparently these old devices do have some form of ESD protection (TVS diodes) and they are rated "ESD Class 1, which is ≤1999V HBM”

    I will update my previous responses to prevent confusion in the future.
  • 0 in reply to Emrys Maier
    TI__Intellectual 2660 points
    Hi Emrys,

    Thank you for clarifying this.

    Best Regards,

    Franz Figueroa
    Texas Instruments