The HMC425 from Analog Devices is a RF Variable Attenuator with Frequency 2.4 to 8 GHz, Attenuation Range 0.5 to 31.5 dB, Attenuation Step 31.5 dB, Power 1 W, P1dB 19 to 22 dBm. Tags: IC, Programmable, Digital. More details for HMC425 can be seen below.