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CY27410, 4-PLL Spread-Spectrum Clock Generator | Cypress Semiconductor

CY27410, 4-PLL Spread-Spectrum Clock Generator

Last Updated: 
May 30, 2020

4-PLL Spread-Spectrum Clock Generator


  • Input frequencies
    • Crystal input: 8 MHz to 48 MHz
    • Reference clock: 8 MHz to 250 MHz LVCMOS
    • Reference clock: 8 MHz to 700 MHz differential
  • Output frequencies
    • 25 MHz to 700 MHz LVDS, LVPECL, HCSL, CML
    • 3 MHz to 250 MHz LVCMOS
    • 1 kHz to 8 MHz for one LVCMOS output
  • RMS phase jitter: 1-ps max at 12-kHz to 20-MHz offset
  • PCIe 1.0/2.0/3.0 compliant
  • SATA 2.0, USB 2.0/3.0, 1/10-GbE compliant
  • Maximum 12 outputs split in two banks of six outputs each.
    • Up to eight differential output pairs (HCSL, LVPECL, CML, or LVDS)
    • Up to 12 LVCMOS outputs
  • Up to 75-ps skew for differential outputs within a bank
  • For more, see pdf.

Functional Description

The CY27410 is a standard-performance programmable clock generator with four independent fractional PLLs, which generates any frequency with a zero-ppm synthesis error. Each PLL is followed by a set of four independent dividers to generate four different frequencies from a single PLL. All four dividers are synchronized to generate phase-aligned clock outputs with minimal skew. The PLLs also support the spread-spectrum feature to reduce EMI. All four PLLs are equipped with VCXO functionality to achieve ppm granularity of output frequency.

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