The SX1231IMLTRT from Semtech Corporation is a general ISM transceiver IC below 1 GHz covering 290–340 MHz, 424–510 MHz and 862 MHz–1.02 GHz, in a 24-VQFN package with exposed pad.
The SX1231HIMLTRT from Semtech Corporation is a general ISM sub-1 GHz RF transceiver IC covering 290–340 MHz, 424–510 MHz and 862 MHz–1.02 GHz, in a 24-VQFN package with exposed pad.