The ADF7021-N from Analog Devices is a RF Transceiver with Frequency 80-650 MHz, 842-916 MHz, Data Rate 24 Kbps, Output Power(dBm) -16 to 13 dBm, Rx Sensitivity -122 dBm, Supply Voltage 2.3 to 3.6 V. Tags: Surface Mount, IC. More details for ADF7021-N can be seen below.