25LC128
SI4031-B1-FM (2)SI4031 (3)SI403 (10)SI40 (39)SI4 (1072)

Silicon Labs

SI4031-B1-FMR

RF Transmitter FSK, GFSK, OOK 240MHz ~ 930MHz 13dBm 256 kbps PCB, Surface Mount Antenna 20-VFQFN Exposed Pad
Silicon Labs

SI4031-B1-FM

RF Transmitter FSK, GFSK, OOK 240MHz ~ 930MHz 13dBm 256 kbps PCB, Surface Mount Antenna 20-VFQFN Exposed Pad

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