Circuits that require multi-frequencies can utilize a crystal for each required frequency as shown in the top diagram. The bottom diagram, the Silicon Labs Si570 or Si598 oscillators with Dual, Quad, or I2C any frequency programmable output replaces multiple crystal oscillators with just one Si570 or Si598 oscillator. Skyworks Solutions is one of the only oscillator vendors to provide flexible timing in the form of storing multiple frequencies on one oscillator selectable via pin, or digitally steerable via a compatible I2C interface. Dual and Quad frequency oscillators can solve multi-frequency applications such as Broadcast Video and OTN applications. The I2C interface provides programmable frequency adjustment, the ultimate in oscillator timing flexibility.