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The LX5543 from Microsemi is a Front End Module with Frequency 2.4 to 2.5 GHz, Tx Gain 25 dB, Tx Current 145 mA, Voltage 3 to 4.2 V. Tags: Transmit / Receive Module. More details for LX5543 can be seen below.
5 GHz 802.11a/n/ac Wi-Fi Front End Module
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