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The ATF-52189 from Avago Technologies is a RF Transistor with Frequency 50 to 6000 MHz, Noise Figure 1.5 dB, Supply Voltage 4.5V, Current 200 mA. More details for ATF-52189 can be seen below.
450 Watt, 50 Volt, 3.1 to 3.5 GHz, GaN RF IMFET
15 Watt, 50 Volt, DC to 4 GHz, GaN RF Transistor
15W, 300 MHz to 1.215 GHz, GaN RF Input-Matched Transistor
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