The HopeRF CMT2219A is an ultra-low-power sub-1 GHz wireless receiver supporting OOK, FSK, and GFSK modulation across 300–960 MHz. With high sensitivity (–109 dBm at 868 MHz), ultra-low sleep current (60 nA), and only 5.7 mA active consumption, it enables long battery life in IoT and wireless applications. Featuring a 32-byte FIFO, Manchester decoding, SPI/EEPROM configuration, and a compact 3×3 mm QFN-16 package, it pairs seamlessly with CMT211xA transmitters for reliable RF links.