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AM26C32: Questions about VIT and VIK

Daichi Kiya
Intellectual 970 points
Part Number: AM26C32


Tool/software:

Hi, team

I have some qustions about AM26C32.

①The threshold is different when VIC is +/-7V and 0-5.5V, does this change between -7 to 0V and 5.5 to 7V?

②Am I correct in understanding that the VIK (enable input clamp voltage)  is the G voltage and nG voltage?

Regards

Daichi

  • +1
    Guru 318050 points

    1. These are worst-case values at the most extreme input voltages. The threshold will change gradually, but these values are all that is guaranteeed.

    2. Yes, VIK applies only to the G/G inputs, and describes what happens when you violate the VI absolute maximum rating.

  • +1
    TI__Guru* 75871 points

    Hi Daichi,

    Clemens is correct. If you're between 0V and -7V then you should assume that Vth is going to be -0.2V. Between 5.5V and 7V then you should assume Vth is 0.2V. 

    VIK calls out the enable inputs so it applies to the G and #G pins. My understanding of this spec is that if you pull -18mA from the pin by pulling the pin negative then the lowest voltage it will be is -1.5V. It doesn't really tell you much.

    -Bobby

  • 0 in reply to BOBBY
    TI__Intellectual 970 points

    Thank you both,

    I have additional questions.

    In my understanding, Il means the input current of A, B.

    In the datesheet, Input current of VIK(G, /G) and input current of A,B use the same simbol Il.

    Is it OK to understand that Il in the upper image is the input current of G and /G, and Il in the lower image is the input current of a and B?

    Regards

    Daichi

  • 0 in reply to Daichi Kiya
    Guru 318050 points

    Yes; "enable input" and "line input" are different pins.