The ASX621 from ASB Inc. is a RF Amplifier with Frequency 900 MHz to 2.7 GHz, Gain 13 to 30.0 dB, Noise Figure 5.6 to 11.5 dB, Output Power 31.5 to 33 dBm, Output Power 1.41 to 2 W. Tags: Chip, Power Amplifier. More details for ASX621 can be seen below.