The CC110LEM 433MHz reference design contains schematics and layout files for the CC110LEM module used in the Value Line development kit. The reference design demonstrates good techniques for CC110L decoupling and RF layout. For optimum RF performance, these parts should be copied accurately. This is a 2-layer reference design with a discrete balun and two antenna options:A small and compact PCB helix antenna that will be useful for applications requiring a high antenna efficiency in a compact area. The 433 MHz PCB helix antenna is only 25 x 12 mm (L x W).A PCB footprint for a single ended 50 ohm antenna. The RF section is designed for operation in the 433 MHz frequency band.