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SI5351A PLL frequency synthesizer
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CD2003 AM/FM Receiver integrated circuit (based on TA2003) including RF mixer
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SI4463/SI4438 ISM band short range communications
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74CBT3253C Dual 4 to 1 multiplexer used for mixers
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SI4732/SI4735 Integrated AM/FM/SSB single-chip receiver
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NRF24L01 2.4 GHz band short range communication
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ESP8266 / ESP32S Arduino-supported microcontrollers with built-in Wifi
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Raspberry Pi Pico/Pico 2 W Pi Pico development boards with built-in Wifi