There are few sites in the Internet about this transceiver, I will list here two good reference:
https://notblackmagic.com/bitsnpieces/ax5043/
This guy created a board with ax5243:
There are few sites in the Internet about this transceiver, I will list here two good reference:
https://notblackmagic.com/bitsnpieces/ax5043/
This guy created a board with ax5243: