The M51 from MACOM is a RF Mixer with RF Frequency 2 to 24 GHz, LO Frequency 2 to 24 GHz, IF Frequency 1 to 15 GHz, Conversion Loss 7.5 to 12 dB, LO Drive - Power 10 dBm. Tags: Surface Mount, Triple Balanced Mixer. More details for M51 can be seen below.