CY25100SXC-049

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY25100SXC-049 is a field and factory programmable spread spectrum clock generator designed for EMI reduction. It operates on a single 3.3 V supply within the commercial temperature range of 0 °C to 70 °C. The device synthesizes output frequencies from 3 MHz to 200 MHz using an integrated PLL, accepting input clocks or crystals between 8 MHz and 166 MHz. It features programmable center spread (±0.25% to ±2.5%) and down spread (-0.5% to -5.0%) with a nominal modulation frequency of 31.5 kHz. The component includes internal load capacitor tuning arrays ranging from 12 pF to 60 pF, eliminating external crystal capacitors. It provides two outputs: a non-modulated REFCLK and a modulated SSCLK.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates a proprietary Phase-Locked Loop 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 capacitance, reference clock enablement, and power-down or output enable functions.
• Includes internal programmable load capacitor tuning arrays at the crystal input pins, which match specific crystal load requirements and remove the necessity for discrete external load capacitors on the circuit board.

Clock Generators, PLLs, Frequency Synthesizers Applications

• High-speed digital electronic systems requiring electromagnetic interference mitigation
• LCD driver ICs utilizing spread spectrum techniques for noise reduction
• Systems needing replacement of multiple discrete crystals and oscillators

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix '049' against official Infineon/Cypress ordering documentation to confirm the exact factory-programmed configuration parameters. Ensure the selected package variant matches the required thermal and mechanical specifications for the target application environment.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a fixed-frequency oscillator must be replaced by a programmable solution to optimize EMC performance without degrading system timing. Consider the CY25100SXC-049 if the design requires specific spread percentages or output frequencies not available in standard off-the-shelf oscillators.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The CY25100 series belongs to Cypress Semiconductor's VersaClock family of programmable clock generators. This series utilizes flash-based technology for field reprogrammability or factory programming for high-volume production, allowing designers to adjust clock parameters during prototyping or final manufacturing stages.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other CY25100 variants such as CY25100SXCF or CY25100ZXIF, provided the specific programmed configuration values are matched or reprogrammed using the CY3672 programmer and appropriate socket adapters.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the function of the SSON# pin?

The SSON# pin is a digital control input that enables or disables the spread spectrum modulation. When driven LOW, modulation is active; when HIGH, the output clock runs at the nominal synthesized frequency without modulation.

How does the device handle crystal load capacitance?

The CY25100SXC-049 contains internal programmable load capacitor arrays at pins XIN and XOUT. These can be tuned from 12 pF to 60 pF in 0.5 pF increments to match the crystal's specified load capacitance, removing the need for external capacitors.

Can the REFCLK output be disabled?

Yes, the buffered reference output (REFCLK) can be programmed to be enabled or disabled. If disabled, the output enters a High-Z state to reduce power consumption and noise.