Infineon/CYPRESS CY25811SZCT

CY25811/12/14 products are Spread Spectrum Clock Generator (SSCG) ICs used for the purpose of reducing electromagnetic interference (EMI) found in today’s high-speed digital electronic systems. The devices use a proprietary phase-locked loop (PLL) and Spread Spectrum Clock (SSC) technology to synthesize and modulate the frequency of the input clock. By frequency modulating the clock, the measured EMI at the fundamental and harmonic frequencies is greatly reduced. This reduction in radiated energy significantly reduces the cost of complying with regulatory agency requirements and improves time to market without degrading system performance. The input frequency range is 4 to 32 MHz and accepts clock, crystal and ceramic resonator inputs. The output clock can be selected to produce 1x, 2x, or 4x multiplication of the input frequency with Spread Spectrum Frequency Modulation. The use of 2x or 4x frequency multiplication eliminates the need for higher order crystals and enables you to generate up to 128 MHz Spread Spectrum Clock (SSC) by using only first-order crystals. This reduces the cost while improving the system clock accuracy, performance, and complexity. Select the Center Spread or Down Spread frequency modulation based on four discrete values of Spread % for each Spread mode with the option of a Non Spread mode for system test and verification purposes. The CY25811/12/14 products are available in an 8-pin SOIC (150 mils) package with a commercial operating temperature range of 0 °C to 70 °C and industrial temperature range of -40 °C to 85 °C.

• 4 to 32 MHz input frequency range
• 4 to 128 MHz output frequency range
• Accepts clock, crystal, and resonator inputs
• 1x, 2x, and 4x frequency multiplication
• Center and Down Spread modulation
• Low power dissipation: 3.3V = 52 mW - typ at 6 MHz; 3.3V = 60 mW - typ at 12 MHz; 3.3V = 72 mW - typ at 24 MHz
• Low cycle-to-cycle jitter: 8 MHz = 480 ps-max; 16 MHz = 400 ps-max; 32 MHz = 450 ps-max
• Available in 8-pin SOIC and TSSOP packages
• Commercial and industrial temperature ranges

• Printers and MFPs
• LCD panels
• Digital copiers
• PDAs
• CD-ROM, VCD, and DVD
• Networking, LAN, and WAN
• Scanners
• Modems
• Embedded digital systems