What this clock generator does on the board
The Infineon CY25560SXC is a single-output spread-spectrum clock generator with an integrated PLL. It accepts a clock or crystal input and produces a modulated output up to 100 MHz, reducing peak radiated emissions at the fundamental and harmonics. The spread-spectrum modulation spreads the output energy across a wider frequency band, lowering EMI peaks by several dB without adding ferrite beads or shielding cans. Operates from a 2.97 V to 3.63 V supply. The 1:1 input-to-output ratio means one clock output. The commercial temperature range (0°C to 70°C) limits it to indoor, climate-controlled equipment: office peripherals, consumer electronics, networking gear, and test equipment. Not rated for industrial or automotive environments without an enclosure that keeps the ambient inside that window.
100 MHz ceiling and what it covers
Maximum output frequency is 100 MHz.
Spread-spectrum benefit — fewer EMI components on the BOM
The spread-spectrum modulation is the key differentiator here. Instead of a clean carrier that concentrates all the energy at one frequency (and its harmonics), this generator spreads that energy. The result is a lower peak amplitude at the fundamental, which can reduce the need for common-mode chokes, ferrite beads, or board-level shielding. For a product chasing FCC/CE conducted-emission limits, this part can save a few dollars in filter components and a few square mm of board area.
Package and footprint
Supplied in an 8-pin SOIC package (3.90 mm body width), surface-mount. The 8-SOIC footprint is standard and widely supported in assembly. No special PCB feature required beyond the usual decoupling capacitor close to the supply pin.
Lifecycle and sourcing position
Listed as Active with ROHS3 compliance.