CY25100SXC-060

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY25100SXC-060 is a field and factory programmable spread spectrum clock generator designed for EMI reduction. It operates on a single 3.3 V supply (3.13 V to 3.45 V) and supports output frequencies from 3 MHz to 200 MHz. The device accepts an external crystal input (8 MHz to 30 MHz) or a reference clock (8 MHz to 166 MHz). It features a nominal modulation frequency of 31.5 kHz, with center spread ranging from ±0.25% to ±2.5% and down spread from –0.5% to –5.0%. The component includes an integrated PLL, programmable crystal load capacitance tuning array (12 pF to 60 pF), and low cycle-to-cycle jitter. It is available in 8-pin SOIC packages.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates a proprietary Phase-Locked Loop (PLL) and Spread Spectrum Clock technology to synthesize and modulate input clock frequencies, significantly reducing radiated electromagnetic interference energy at fundamental and harmonic frequencies.
• Features a programmable configuration memory array that allows customization of output frequency, spread percentage, crystal load capacitor values, and control pin functions without requiring external components.
• Provides two distinct clock outputs: a non-spread REFCLK output that mirrors the input frequency and phase, and an SSCLK output that delivers the synthesized spread spectrum signal.

Clock Generators, PLLs, Frequency Synthesizers Applications

• High-speed digital electronic systems requiring compliance with regulatory EMC standards
• LCD driver ICs utilizing spread spectrum techniques for noise reduction
• Embedded processors and controllers needing optimized clock generation

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type, temperature range, and programming status. Ensure the selected variant matches the required commercial or industrial operating conditions. Confirm availability through authorized distributors as part numbers may be subject to change or obsolescence.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when system design requires flexible clock synthesis with built-in EMI mitigation capabilities. Consider the CY25100 for applications needing precise control over spread spectrum parameters and internal load capacitance tuning. Evaluate the need for field versus factory programmability based on production volume and prototyping requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The CY25100 series belongs to Cypress Semiconductor's VersaClock family of programmable clock generators. This series is engineered to replace multiple discrete crystals and oscillators, thereby saving board space and reducing overall system cost while maintaining high performance and low power consumption.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other CY25100 variants such as CY25100SXCF or CY25100ZXIF, depending on the required package and temperature rating. Verify compatibility with existing PCB footprints and configuration settings before substitution.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the function of the SSON# pin?

The SSON# pin serves as a digital control input to enable or disable spread spectrum modulation. When driven LOW, modulation is active; when HIGH, modulation stops and the output remains at the nominal frequency.

How does the programmable capacitance feature benefit the design?

The internal programmable capacitance array (12 pF to 60 pF) eliminates the need for external crystal load capacitors, simplifying the circuit design and reducing component count.

Can the REFCLK output be disabled?

Yes, the REFCLK output can be programmed to be enabled or disabled. If not required, it should be set to High Z (clock off) to minimize power consumption and potential interference.