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CY2542, Quad PLL Programmable Spread Spectrum Clock Generator with Two Wire Serial Interface and Frequency Select | Cypress Semiconductor

CY2542, Quad PLL Programmable Spread Spectrum Clock Generator with Two Wire Serial Interface and Frequency Select

Last Updated: 
Jul 02, 2020
Quad-PLL Programmable Spread Spectrum Clock Generator with Two-Wire Serial Interface and Frequency Select


  • Device operating voltage option:1.8 V
  • Selectable clock output voltages:1.5 V, 1.8 V, 2.5 V, 3.0 V, or 3.3 V
  • Fully integrated ultra low power phase-locked loops (PLLs)
  • Input reference clock frequency range:External crystal: 8 to 48 MHz and External reference: 1 to 48 MHz clock
  • Output clock frequency range:3-50 MHz for 1.5 V/1.8 V output voltage and 3-166 MHz for 2.5 V/3.0/3.3 V output voltage
  • Up to eight programmable output clocks through 2-wire serial interface
  • Programmable output drive strengths
  • Frequency select feature with option to select four different clock Frequencies over eight clock outputs
  • 150 ps typical cycle-to-cycle jitter
  • 24-pin (4 × 4 × 1 mm) QFN Package
  • Commercial temperature range

General Description

4 Configurable PLLs The CY2542 is a four-PLL clock generator IC. It can be used to generate four independent output frequencies ranging from 3 to 50 MHz (for 1.5 V/1.8 V output voltage) or 3-166 MHz (for 2.5 V/3.0 V/3.3 V output voltage) from a single crystal or a reference clock. 2-wire Serial Interface Programming The CY2542 have a 2-wire serial interface that programs the configuration memory array to synthesize output frequencies by programmable output divider, spread characteristics, and drive strength. 2-wire Serial Interface can also be used for in-system control of these programmable features.

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