It features 8 I/Os.I would say that it has 16 terminations as a whole.There are a total of 16 pins on the part.There are a total of four 1 ports on the device.The transistor belongs to the PARALLEL IO PORT, GENERAL PURPOSE uPs/uCs/peripheral ICs type.
CAT9534YI-GT2 Features
CAT9534YI-GT2 Applications
There are a lot of Rochester Electronics, LLC CAT9534YI-GT2 I/O Expanders applications.