The ST25R3912 from STMicroelectronics is a RFID Reader IC with Current 5.4 to 7.5 mA (Ready mode), Operating Temperature -40 to 125 Degree C, Output Power 1000 mW, Storage Temperature -55 to 125 Degree C, Voltage 2.4 to 5.5 V. More details for ST25R3912 can be seen below.