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CY25100: Field and Factory Programmable Spread Spectrum Clock Generator for EMI Reduction | Cypress Semiconductor

CY25100: Field and Factory Programmable Spread Spectrum Clock Generator for EMI Reduction

Last Updated: 
Nov 13, 2016
Version: 
*L

Field and Factory Programmable Spread Spectrum Clock Generator for EMI Reduction

Features

  • Wide Operating Output (SSCLK) Frequency Range
    • 3 MHz to 200 MHz
  • Programmable Spread Spectrum with nominal 31.5 kHz Modulation Frequency
    • Center Spread: ±0.25% to ±2.5%
    • Down Spread: –0.5% to –5.0%
  • Input frequency range
    • External Crystal: 8 to 30 MHz Fundamental Crystals
    • External Reference: 8 to 166 MHz Clock
  • Integrated Phase-Locked Loop (PLL)
  • For more, see pdf

General Description

The CY25100 is a Spread Spectrum Clock Generator (SSCG) IC used to reduce EMI found in today’s high speed digital electronic systems.

The device uses a Cypress proprietary PLL and Spread Spectrum Clock (SSC) technology to synthesize and modulate the frequency of the input clock. By frequency modulating the clock, the measured EMI at the fundamental and harmonic frequencies are greatly reduced.