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SN74ALVC245: the max output current

qiang xiang
Intellectual 290 points
Part Number: SN74ALVC245

There is one description as belows in the datasheet  Page 2:

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†

Continus  current through  VCC or GND               +/-100mA   max

If  my customer need driver 8 channels simultaneous with 15mA output current per channel.

That is 15*8=120mA  > 100mA 

What will happen to the SN74ALVC245?  Will it burn down?

If so,  can you tell me which device will be suitable for this case?

Best regards!

  • 0
    TI__Guru* 96591 points

    Hi,

    There will likely be damage to the internal metal structures on the silicon - either slow degradation or a quick failure ("burning down").

    The simple answer is that TI does not guarantee parts beyond the absolute maximum ratings.  It might work forever at 120mA, or it might fail catastrophically at 100.001mA - the correct thing to do is to limit current to the maximum, or add an output driver to increase current driving capability.

    If you can share your application (ie why you need 15mA) and explain further, I will be happy to try to help you stay within the datasheet values by either changing devices or adjusting system parameters.