The MAX9939 from Maxim Integrated is a RF Amplifier with Supply Voltage 2.9 to 5.5, Current Consumption 3.4 to 6.7 mA, Operating Temperature -40 to 125 Degree C, Storage Temperature -65 to 150 Degree C. Tags: Surface Mount, Programmable Gain Amplifier. More details for MAX9939 can be seen below.