Spread-spectrum PLL for conducted EMI control
The Renesas 5P50901NBGI is a single-circuit PLL-based clock generator that takes a clock input and outputs a spread-spectrum clock up to 25 MHz. The internal PLL modulates the output frequency to spread the radiated energy across a wider band, reducing peak EMI at the fundamental and harmonics — a common fix when a design fails radiated emissions on a narrowband peak. Supply range of 1.7 V to 3.63 V. The 1:1 input-to-output ratio means no frequency multiplication or division. Housed in an 8-DFN (2x2 mm) package, it is a reflow-only part.
25 MHz ceiling — where it fits and where it doesn't
At 25 MHz max output, this part is sized for MCU clock inputs, USB full-speed reference clocks, audio codec MCLK, or baseband processors. The differential input and output are both marked No, so all signals are single-ended CMOS. That limits noise immunity on long board traces but keeps the pin count low.
Industrial temperature range — field deployment
Rated -40°C to 85°C, the 5P50901NBGI suits outdoor telecom cabinets, factory automation controllers, and industrial sensor hubs. Not qualified for under-hood automotive (no AEC-Q100) or extended-temp downhole gear.
Lifecycle and compliance
ROHS3 compliant, so it passes EU RoHS requirements for new designs.