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

Features

• 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.