The CHT4012a98F from United Monolithic Semiconductors is a RF Variable Attenuator with Frequency DC to 6 GHz, Attenuation Range 31.5 dB, Power 0.2 W, P1dB 20 dBm, Insertion Loss 2.5 dB. Tags: Module with Connectors, Digital. More details for CHT4012a98F can be seen below.