The HMC387MS8 from Analog Devices is a RF Mixer with RF Frequency 0.45 to 0.5 GHz, LO Frequency 300 to 500 MHz, IF Frequency DC to 0.15 GHz, Conversion Loss 9.5 dB, LO Drive - Power 17 dBm. Tags: Surface Mount, Single Balanced Mixer. More details for HMC387MS8 can be seen below.