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TCAL9538: Query on maximum output drive current of TCAL9538PWR

Arunkumar S
Prodigy 50 points

Part Number: TCAL9538

Hi Team,
I have a few questions regarding the TCAL9538PWR device. 

I am planning to use the I2C IO expander to drive an 7 segment display and would like clarification on the maximum output drive current per Port when operating at a 3.3 V supply. 

Additionally, I noticed in the datasheet that the device includes internal pull-up and pull-down resistors with a minimum value of 70K. Could you please clarify whether these ports are capable of driving LEDs with minimum 3-5mA drive current 

  • 0
    Guru 325520 points

    For output currents up to ±10 mA, the output voltages (VOL/VOH) are guaranteed. (For 3.3 V, add 0.3 V to the 3 V value.) The absolute maximum ratings allow up to 50 mA without damaging the device, but for currents between 10 mA and 50 mA, the output voltage is not guaranteed.

    The pull-up/-down resistors are enabled only when you have configured them.

  • 0
    TI__Guru 62908 points

    Hi Arunkumar,

    Please let me know if you have any more questions. I agree with Clemens here. 

    Regards,

    Tyler