The HMC654 from Analog Devices is a Fixed Attenuator with Frequency DC to 50 GHz, Attenuation 4 dB, Power 0.31 W, 24.91 dBm, Attenuation Accuracy ±0.2 dB, Operating Temperature -40 to 85 Degree C. Tags: Die. More details for HMC654 can be seen below.