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TCA9554A: Variation range of internal pull-up resistor

Masanori Tachibana
Genius 5350 points
Part Number: TCA9554A


Hello support team,

The IO port of TCA9554A has a built-in pull-up resistor, which typical value is 100 kΩ.
What is the variation range (maximum and minimum value) of this pull-up resistor?

Sincerely,
M. Tachibana

  • 0
    TI__Guru* 78081 points

    Hello M. Tachibana,

    The pull up resistor value is not a electrical characteristic so finding char-values for this pull up resistance is not easy.

    Would it be sufficient if I measured the pull up resistances myself with a digital multimeter for ~5 units and we make an assumption of a tolerance of around 10% for the value I find?

    Let me know if this kind of data would be okay with you.

    -Bobby

  • 0 in reply to BOBBY
    Genius 5350 points

    Hello Bobby-san,

    Sorry for my late reply.
    Thank you for your comment.

    I understood that the variation range of internal pull-up resistor is not known because its value is not a particularly controlled characteristic.
    Considering the manufacturing variation of semiconductors, I thought it would be better to estimate around ± 15 to 20%.

    Sincerely,
    M. Tachibana