P2811A

P2811A/B and P2812A/B and P2814A/B Low Power EMI Reduction IC Features FCC approved method of EMI attenuation Provides up to 15dB EMI reduction Generates a 1x, 2x and 4x low EMI spread spectrum clock of the input frequency o 1x: P2811A/B o 2x: P2812A/B o 4x: P2814A/B Optimized for input frequency range from 10MHz to 40MHz Internal loop filter minimizes external components and board space Selectable spread options: o Down Spread and Center Spread 8 frequency deviation selections: o ±0.625% to -3.5% Low inherent Cycle-to-Cycle Jitter 3.3V Operating Voltage CMOS/TTL compatible inputs and outputs. Pin-out compatible with Cypress CY25811, CY25812 and CY25814 Available in 8-pin SOIC Package Product Description The P28XX devices are versatile spread spectrum frequency modulators designed specifically for a wide range of input clock frequencies from 10MHz to 40MHz. Refer to Input/output Frequency Range Selection Table. The P28XX can generate an EMI reduced clock from crystal, ceramic resonator, or system clock. The P28XX-A and the P28XX-B offer various combinations of spread options and percentage deviations. Refer to Frequency Deviation and Spread Selection Table. These combinations include Down and Center Spread, and percentage deviation range from ±0.625% to -3.5%. The P28XX reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of downstream clock and data dependent signals. The P28XX allows significant syst...