CY26121 Datasheet | Cypress

Packet Clock™ Spread Spectrum Clock Generator Features - - - - - - Benefits - - - - - Integrated phase-locked loop (PLL) Low jitter, high-accuracy outputs 3.3V operation 25-MHz input frequency 66.66-MHz or 33.33-MHz selectable output frequency (orig, -3,-11,-31) 33.33-MHz or 25-MHz selectable output frequency (-2,-21) High-performance PLL tailored for Spread Spectrum application Meets critical timing requirements in plex system designs Enables application patibility Works with monly available crystal or driven reference Downspread Spread Spectrum with 30-k Hz nominal modulation frequency Table 1. Frequency Table for CLKA-D Part Number CY26121 CY26121-2 CY26121-3 CY26121-11 CY26121-21 CY26121-31 CLKSEL=0 66.66 MHz 33.33 MHz 66.66 MHz 66.66 MHz 33.33 MHz 66.66 MHz CLKSEL=1 33.33 25.00 33.33 33.33 25.00 33.33 Spread% - 2.8% - 2.8% - 1.4% - 2.8% - 2.8% - 1.4% Parallel Crystal Load 6 p F 6 p F 6 p F 15 p F 15 p F 15 p F Logic Block Diagram VDDL 25 MHz XIN XOUT OSC. PLL with Modulation Control CLKA CLKB CLKC SSON Flash Configuration OUTPUT MULTIPLEXER AND DIVIDERS CLKD VSSL CLKSEL .. AVDD AVSS Cypress Semiconductor Corporation Document #: 38-07350 Rev. -...