The MGA-31489 from Broadcom is a RF Amplifier with Frequency 1.9 GHz, Gain 18.2 to 21.2 dB, Noise Figure 1.9 dB, Output Power 20.1 to 22.2 dBm, Output Power 0.1 to 0.17 W. Tags: Surface Mount, Gain Block, Driver Amplifier. More details for MGA-31489 can be seen below.