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ULN2004A: Feature size

William Mackin
Intellectual 460 points
Part Number: ULN2004A

I'm looking for the feature size for the ULN2004A.  Our application may have to operate in an environment with some radioactive particles.

Can you tell me the feature size, in nm or um, for this part?

Thank you.

  • 0
    TI__Genius 13760 points

    Hi Bill,

    Welcome to E2E!

    As this is an old device that information is not readily available. This is also information we do not like to disclose as it gives out information of the internal circuitry of our IC's.

    When dealing with radioactive particles the best way to ensure the device will function would be to test it for these types of applications.

    Best regards,

    Andy Robles

  • 0 in reply to Andy Robles
    Intellectual 460 points

    Is it possible to just say if the feature size is >50nm, between 35 and 50, or <35?  Possibly by the age, or by the die-fab facility they were made in?

  • 0 in reply to William Mackin
    TI__Genius 13760 points

    Hi Bill,

    I am currently waiting on a response from the design team of the device to see if we can share the information, and if so what the value would be. I will get back to you as soon as I get some feedback.

    Best regards,

    Andy Robles

  • 0 in reply to Andy Robles
    TI__Genius 13760 points

    Hi Bill,

    In space applications where the IC will be exposed to radiation, the components need to be radiation hardened. As the ULN2004A was not designed to operate in space, we cannot guarantee any robustness for the device over radiation particles. The IC may still be used in the application, but it would be at your own risk. With the provided feedback, would you still like the information requested?

    Best regards,

    Andy Robles

  • 0 in reply to Andy Robles
    Intellectual 460 points

    I don't know if the environment for this part will be space, air, or ground based, just that they are concerned about SEE's.

    We will attempt to get the information via electron microscopy.  
    You can close this thread.  Thank you.