The HMC472LP4 from Analog Devices is a RF Variable Attenuator with Frequency 0 to 3.8 GHz, Attenuation Range 0.5 to 31.5 dB, Attenuation Step 31.5 dB, Power 0.1 W, Insertion Loss 1.5 dB. Tags: IC, Programmable, Digital. More details for HMC472LP4 can be seen below.