SiliconLaboratories'Si4438isahigh-performance,low-currenttransceiverscoveringthesub-GHzfrequencybandsfrom425to525MHz.TheSi4438istargetedattheChinesesmartmetermarketandisespeciallysuitedforelectricmeters.Thisdeviceisfootprint-andpin-compatiblewiththeSi446xradios,whichprovideindustry