The ICS525-01 and ICS525-02 OSCaRTM are the most flexible way to generate a high quality, high accuracy, high frequency clock output from an inexpensive crystal or clock input. The name OSCaR stands for OSCillator Replacement, as they are designed to replace crystal oscillators in almost any electronic system. The user can easily configure the device to produce nearly any output frequency from any input frequency by grounding or floating the select pins. Neither microcontroller nor software nor device programmer are needed to set the frequency. Using Phase-Locked-Loop (PLL) techniques, the device accepts a standard fundamental mode, inexpensive crystal to produce output clocks up to 250 MHz. It can also produce a highly accurate output clock from a given input clock, keeping them frequency locked together.