This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Hi team,
I have customer design in TCA9555 and PCA9555 at same design.
Here is their block.
And they found out if they turn the switch to low, point B will be 1.6V. And the issue only show at TCA9555 not PCA9555.
What's the different with TCA9555 and PCA9555? What makes this issue happen?
The xCA9555 devices have internal 100 kΩ pull-up resistors. Those and R2 form a voltage divider.
What is the purpose of R2?