The DTF-4A-1250 SQ from Crane Aerospace & Electronics is a Space Qualified RF Mixer with RF Frequency 1 MHz to 3.5 GHz, LO Frequency 1 MHz to 3.5 GHz, IF Frequency 1 MHz to 1 GHz, Conversion Loss 6.5 to 9.5 dB, LO Drive - Power 15 dBm. Tags: Surface Mount. More details for DTF-4A-1250 SQ can be seen below.