CY25701FLXCT

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. This reduction in radiated energy significantly reduces the cost of complying with regulatory agency (EMC) requirements and improves time-to-market without degrading system performance. The CY25701 uses a programmable configuration memory array to synthesize output frequency and spread percentage. The spread percentage is programmed to center spread or down spread with various spread percentages. The range for center spread is from ±0.25% to ±2.00%. The range for down spread is from –0.5% to –4.0%. Contact the factory for smaller or larger spread percentage amounts if required. The frequency modulated SSCLK output is programmable from 10 to 166 MHz. The CY25701 is available in a 4-pin ceramic SMD package with an operating temperature range of –40 °C to 85 °C.

• 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
• 3.3 V operation
• Output enable function
• Package available in 4-pin ceramic LCC SMD
• Pb-free package
• Industrial temperature from -40 °C to 85 °C