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MAX3232: what's the effect of Contact Discharge and Air-Gap Discharge?

Howard Zou
Genius 12365 points
Part Number: MAX3232

Hi,

my customer was using SP3232EEY, and I searched online that MAX3232E is the right choice to replace it.

But the supply of MAX3232E is not good and MAX3232 supply is good at the moment.

And the only difference is that MAX3232E has Contact Discharge and Air-Gap Discharge parameter but MAX3232 doesn't have.

Then I wonder what side effect if I use MAX3232 instead of MAX3232E in the application?

  • 0
    TI__Guru 74292 points

    Howard,

    The Contact and Air-gap discharge parameters for MAX3232E means that this device has integrated ESD protection up to the specified value listed in the datasheet.

    Can you elaborate on what you mean by "the supply of MAX3232E is not good and MAX3232 supply is good at the moment" ?

    Regards,

    Eric Hackett 

  • 0 in reply to Eric Hackett
    TI__Genius 12365 points

    Eric,

    I mean MAX3232E has no free stock, MAX3232 has free stock at this moment. So delivery is the first concern of the customer.

    The Contact and Air-gap discharge parameters for MAX3232E means that this device has integrated ESD protection up to the specified value listed in the datasheet.

    I know, but what's the bad effect if we can't guarantee the value like MAX3232 for a real application?

  • +1 in reply to Howard Zou
    TI__Guru 53575 points

    Hi Howard,

    In a real application, MAX3232E can be expected to withstand a greater magnitude of ESD event than the MAX3232. The IEC61000-4-2 test standard is typically used by manufacturers to evaluate devices so that their system can meet a certain rating for integrity against ESD and surge events. We've conducted this testing for MAX3232E to promote its aptitude for such systems. We have not conducted this testing for MAX3232 so we can't guarantee how the device will perform in such a test. 

    As far as functionality goes, this difference will have no impact during normal operating conditions. It simply means we cannot guarantee performance under a certain test standard. 

    Regards,
    Eric Schott