The HMC621LP4 from Analog Devices is a RF Mixer with RF Frequency 0.9 to 1.6 GHz, LO Frequency 450 MHz to 1.5 GHz, IF Frequency 0.05 to 0.5 GHz, Conversion Gain 30 dB, P1dB 18.5 to 19 dBm. Tags: Surface Mount, Down-Conversion Mixer. More details for HMC621LP4 can be seen below.