The MGA-31189 from Broadcom is a RF Amplifier with Frequency 900 MHz, Gain 19 to 23 dB, Noise Figure 3 dB, Output Power 22.3 to 24.4 dBm, Output Power 0.17 to 0.28 W. Tags: Surface Mount, Gain Block, Driver Amplifier. More details for MGA-31189 can be seen below.