CY2545FC

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY2545FC is a quad PLL programmable spread spectrum clock generator housed in a 24-pin QFN package. It supports an input frequency range of 8 to 166 MHz via external crystal or reference clock, and synthesizes output frequencies from 3 to 166 MHz. The device operates with a VDD supply voltage of 2.5V, 3.0V, or 3.3V. It features four independent PLLs, serial I2C programming, glitch-free frequency switching, and up to eight clock outputs with programmable drive strength.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Four fully integrated phase locked loops (PLLs) for synthesizing unrelated frequencies
• Serial I2C interface for programmable configuration of frequencies, drive strength, and spread spectrum characteristics
• Programmable spread spectrum with center and down spread options and Lexmark and Linear modulation profiles
• Glitch-free outputs while frequency switching using nonvolatile memory storage

Clock Generators, PLLs, Frequency Synthesizers Applications

• PC, consumer, portable, and networking applications
• System frequency margin tests
• EMI reduction in complex system designs

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'FC' against official Cypress ordering information to confirm factory-programmed configuration details. Confirm the required operating temperature range (commercial or industrial) and ensure the correct VDD supply voltage variant is selected for the target application.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when multiple independent clock frequencies are required from a single crystal source. Ensure the design accommodates the 24-pin QFN package dimensions and provides separate power supplies for the three output driver banks if different output voltage levels are needed.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The CY2545 is part of the VersaClock family of clock generators. It shares architectural similarities with the CY2547, which differs primarily in its lower 1.8V supply requirement. Both devices offer quad PLL capabilities and I2C programmability for flexible clock distribution systems.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The CY2547 serves as a low-voltage alternative within the same family. Verify that the target system can support the 1.8V core voltage of the CY2547 if considering it as a substitute for the higher voltage CY2545 variants.