Hi there
There is nothing wrong with ICs or the circuit diagram it is just that the decoder's data pins are pulled up by default, so they will remain high until any low logic is received from it's paired encoder. Make sure to match their address otherwise no reception will be done.
Check out these links:
"engineersgarage.com/contribution/interfacing-rf-module-8051-microcontroller"
"engineersgarage.com/contribution/controlling-home-appliances-wirelessly-using-rf-technology"