Drive Setting for CY22381

Question: Which is the output drive setting for the CY22381 that would closely match the one which was present for CY2071AF?

 

Answer:

The output impedance changes with the drive strength level that is chosen. The CY2071AF has two drive settings and the CY22381 has four which are as follows:


For the CY22381, we have

 

Medium Low which is the default with 18 Ohms impedance.
Low with 26.8 Ohms impedance.
MHigh with 16 Ohms impedence.
High with 12.8 Ohms impedence.

 

For the CY2071AF, we have Output impedance as 22.5 Ohms when operated at 5V and 29.5 Ohms when operated at 3.3V.

 

So the output drive setting for the CY22381 that would closely match the one which was present for CY2071AF is LOW with 26.8 Ohms output impedance.