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AN49107 - Total System Timing and EMI Reduction Using the CY25400 Spread Spectrum Clock Generator

Last Updated: 09/05/2012
Version: *C

AN49107 describes the features and advantages of four phase-locked loop (PLL) ICs of CY254XX and CY254X clock synthesizers.The application note also details the EMI noise elimination technique using spread spectrum method.

Several applications require a number of independent frequencies to be generated using clock generators. Crystals and clock generators with one or two PLLs limit this requirement. Moreover traditional methods (ferrite beads, filtering, and so on.) are followed for EMI reduction with compromise in design time and accuracy. These limitations and issues are overcome by using Cypress CY254XX and CY254X series.


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Spec No: 001-49107; Sunset Owner: AJU; Secondary Owner: AJU; Sunset Date: 09/17/11

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