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SN74CBT16390 - About supply current (Icc & ⊿Icc)

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Guru 21045 points
Other Parts Discussed in Thread: SN74CBT16390

Hi Team,

 

Our customer would like to know about supply current (Icc & ⊿Icc).

Could you please let me ask the following question?

 

------------------------------

[Q1]

How much is Icc if they use SN74CBT16390 at the following conditions?

I believe that Icc is the following value.

Is my understanding correct?

 

------------------------------

 

[Q2]

Is ⊿Icc the worst value if the control pin (/OE1 & /OE2) is 3.4V?

Therefore, is "one input at 3.4V" mentioned in test condition of datasheet?

And, could you please send it to me if you have a similar graph of SN74CBT16390?

 

http://www.ti.com/lit/an/szza036b/szza036b.pdf

 

------------------------------

 

Regards,

Kanemaru

  • 0
    TI__Mastermind 46480 points

    Hi Kanemaru-san

     Your understanding is correct as shown in your charts. 

    The delta Icc will be worse case the closer the input comes to the switching threshold so the spec in the datasheet is not worst case. It will be worst cas at about Vcc/2 which is the CMOS switching threshold.

    The Delta Icc in the spec is only measured at 3.4V.

  • 0 in reply to Chris Cockrill
    Guru 21045 points

    Hi Chris-san,

     

    Thank you for your prompt reply.

    I understood that the delta Icc will be worst case at about Vcc/2.

     

    And, I have one more question.

    Could you please let me know the delta Icc at the control input voltage = 3.0V?

    My customer would like to use it at this condition.

     

    Regards,

    Kanemaru