PLL-based spread spectrum clock generator for EMI reduction
The CY25023SXC-1 is a PLL-based spread spectrum clock generator from Infineon, designed to reduce electromagnetic interference (EMI) in digital systems by modulating the output clock frequency over a controlled bandwidth. It accepts a clock or crystal input and delivers a single clock output up to 52 MHz. The internal PLL multiplies the reference to generate the spread spectrum modulation profile, making it a direct drop-in for reducing radiated emissions without redesigning the PCB layout.
Supply rail and temperature constraints
The device operates from a narrow supply range of 3.13 V to 3.45 V — a clean 3.3 V rail is required, with sufficient decoupling (0.1 µF and 10 µF ceramic caps at the supply pin) to keep ripple below 50 mV peak-to-peak. If your system sees -40°C or +85°C, you need a different part.
8-SOIC package and footprint
The package is compatible with reflow soldering per JEDEC MSL-1 (moisture sensitivity level 1, no bake required before reflow).