The HMC666LP4 from Analog Devices is a RF Mixer with RF Frequency 3.1 to 3.9 GHz, LO Frequency 2.8 to 3.6 GHz, IF Frequency DC to 0.8 GHz, Conversion Loss 9 dB, P1dB 23 dBm. Tags: Surface Mount, Double Balanced Mixer. More details for HMC666LP4 can be seen below.