Spread Spectrum Clocks

IDT spread spectrum clocks slightly modulate the output frequency to lower the peak energy generated by a clock to help reduce EMI for both the fundamental, and subsequent harmonic frequencies. Using IDT's proprietary mix of analog and digital Phase Locked Loop (PLL) technology, the device spreads the frequency spectrum of the output, reducing the frequency amplitude peaks by several dB depending on spread range.

On June 29, 2011, IDT introduced the IDT 5P5090x family of devices that support spread spectrum clocking frequencies from 10MHz to 170MHz with seven selectable modulation amplitudes and operate with a supply voltage down to 1.8V for reduced power consumption. The devices are available in a low-cost, minuscule 2x2mm 8-pin DFN or MSOP package, minimizing the board area required for placement, a critical requirement for today's compact consumer products.