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The MABA-008980-CF0440 from MACOM is a Balun with Frequency 50 to 1000 MHz, Impedance Ratio (Num) 1:4, Insertion Loss 7.8 dB. More details for MABA-008980-CF0440 can be seen below.
1:1 Transmission Line Transformer from 45 to 1200 MHz
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