Found 4 alternatives for ATA8520-GHPW by Microchip Technology. Rf Transmitters — 32-VFQFN Exposed Pad.
RF XMITTER 110-205KHZ 32VFQFN
RF TX IC ISM 164-192MHZ 32VFQFN
RF TX IC ASK/FSK 433MHZ 32VFQFN
RF TRANSMITTER 205MHZ 32VFQFN