Designers can divide the VCO frequency by 1, 2, 4, 8, 16, 32, or 64 circuits to generate RF output frequencies down to 53.125MHz. The ADF535x's wideband, microwave VCO design enables 6.8GHz to 13.6GHz operation at one RF output. The ADF535x synthesizers operate using 3.15V to 3.45V analog and digital power supplies. The synthesizers also use a 4.75V-5.25V charge pump and VCO supplies. If an application requires isolation, designers can mute the RF output stage. The designers can also control the on-chip registers using a simple 3-wire interface.