The SE2431L is a high-performance, fully integrated RF Front-End Module (FEM) that is designed for ZigBee®/Smart Energy and 802.15.4 applications. The SE2431L is designed for ease of use and maximum flexibility, with fully matched 50 Ω input and output, integrated inter-stage matching and harmonic filter, and digital controls that are compatible with 1.6 V to 3.6 V Complementary Metal Oxide Semiconductor (CMOS) levels. The RF blocks operate over a wide supply voltage range from 2.0 V to 3.6 V, which allows the SE2431L to be used in batterypowered applications over a wide spectrum of the battery discharge curve. A functional block diagram is shown in Figure 1. The pin configuration and package are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1.