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CY2XP22: Crystal to LVPECL Clock Generator | Cypress Semiconductor

CY2XP22: Crystal to LVPECL Clock Generator

Last Updated: 
Aug 26, 2015

Crystal to LVPECL Clock Generator


  • One LVPECL Output Pair
  • Selectable Frequency Multiplication: x2.5 or x5
  • External Crystal Frequency: 25.0 MHz
  • Output Frequency: 62.5 MHz or 125 MHz
  • Low RMS Phase Jitter at 125 MHz, using 25 MHz Crystal (1.875 MHz to 20 MHz): 0.4 ps (Typical)
  • Phase Noise at 125 MHz:
    Offset Noise Power
    1 kHz –117 dBc/Hz
    10 kHz –126 dBc/Hz
    100 kHz –131 dBc/Hz
    1 MHz –131 dBc/Hz
  • Pb-free 8-Pin TSSOP Package
  • Supply Voltage: 3.3V or 2.5V
  • Commercial and Industrial Temperature Ranges


Functional Description


The CY2XP22 is a PLL (Phase Locked Loop) based high performance clock generator that uses an external reference crystal. It is specifically targeted at FibreChannel and Gigabit Ethernet applications. It produces a selectable output frequency that is 2.5 or 5 times the crystal frequency. With a 25 MHz crystal, the user can select either a 62.5 MHz or 125 MHz output. It uses Cypress’s low noise VCO technology to achieve less than 1 ps typical RMS phase jitter. The CY2XP22 has a crystal oscillator interface input and one LVPECL output pair.