The AST54S from ASB Inc. is a RF Amplifier with Frequency 900 MHz to 3.3 GHz, Gain 10 to 19.0 dB, Noise Figure 0.4 to 0.80 dB, Output Power 18 to 19 dBm, Output Power 0.06 to 0.08 W. Tags: Chip, Low Noise Amplifier. More details for AST54S can be seen below.