CY25701: Programmable High Frequency Crystal Oscillator with Spread Spectrum (SSXO) and No Spread Spectrum (XO) Option

Programmable High Frequency Crystal Oscillator with Spread Spectrum (SSXO) and No Spread Spectrum (XO) Option

Features

• Crystal Oscillator with Spread Spectrum Clock (SSXO)
• No Spread Spectrum (XO) Option
• Wide operating output clock frequency range of 10 to166 MHz
• Programmable spread spectrum with nominal 31.5 kHz modulation frequency
• Center spread: ±0.25% to ±2.0%
• Down spread: –0.5% to –4.0%
• No spread: ± 0.0%
• Integrated phase-locked loop (PLL)
• 85 ps typical cycle-to-cycle jitter with SSCLK = 133 MHz
• For more, see pdf

Functional Description

The CY25701 is a Spread Spectrum Crystal Oscillator (SSXO) IC used to reduce the 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 embedded input crystal. By frequency modulating the clock, the measured EMI at the fundamental and harmonic frequencies are greatly reduced.