The SM4B from MACOM is a RF Mixer with RF Frequency 10 MHz to 1.5 GHz, LO Frequency 10 MHz to 1.5 GHz, IF Frequency DC to 1 GHz, Conversion Loss 7.5 to 10 dB, LO Drive - Power 13 dBm. Tags: Surface Mount, Double Balanced Mixer. More details for SM4B can be seen below.