PCA9555: what's the difference between PCA9555 and PCA9548A

Anders Yang

Prodigy 570 points

Part Number: PCA9555
Other Parts Discussed in Thread: PCA9548A

Hi, what's the difference between PCA9555 and PCA9548A?

I can't find the datasheet of PCA9548A from ti.com. Does PCA9548A cover all specs of PCA9555 and replace it?

You can also contact me by email if necessary, thanks.

over 4 years ago

0 BOBBY over 4 years ago

TI__Mastermind 49050 points

Hey Anders,

Is it possible that you have posted the wrong device numbers? PCA9555 is an IO expander and PCA9548A is a switch. They are completely different devices. They would not be pin to pin replacements because they perform different tasks/solve different problems.

-Bobby

Interface

Interface forum

PCA9555: what's the difference between PCA9555 and PCA9548A