The HMC557LC4 from Analog Devices is a RF Mixer with RF Frequency 2.5 to 7 GHz, LO Frequency 5.0 to 7.0 GHz, IF Frequency DC to 3 GHz, Conversion Loss 7 dB, LO Drive - Power 15 dBm. Tags: Surface Mount, Double Balanced Mixer. More details for HMC557LC4 can be seen below.