CY25404ZXI231

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY25404ZXI231 is a Quad PLL Programmable Clock Generator with Spread Spectrum, manufactured by Infineon Technologies (formerly Cypress Semiconductor). It features four fully-integrated phase-locked loops capable of synthesizing frequencies from 3 to 166 MHz. The device supports input frequencies of 8 to 48 MHz via external crystal or 8 to 166 MHz via external reference clock. It provides up to nine programmable clock outputs across three independent voltage banks (1.8 V, 2.5 V, 3.0 V, or 3.3 V), allowing flexible drive strength and output levels. The component operates within an industrial temperature range of -40 °C to +85 °C and is housed in a 20-pin TSSOP package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Four independent programmable PLLs enable the synthesis of multiple unrelated frequencies from a single reference source.
• Integrated spread spectrum modulation capability on two PLLs for system electromagnetic interference reduction.
• Nine clock outputs organized into three independently powered voltage banks for customized signal levels.
• Glitch-free frequency switching functionality ensures uninterrupted system operation during transitions.

Clock Generators, PLLs, Frequency Synthesizers Applications

• PC motherboard clock distribution
• Consumer electronics timing synchronization
• Portable device power management clocks
• Networking equipment signal generation

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against current Infineon documentation to confirm factory-programmed configuration details. Confirm availability status as this part number may be subject to discontinuation or lifecycle changes. Ensure compatibility with required industrial temperature ranges and voltage specifications before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when multiple independent clock frequencies are required from a single package. Verify that the desired output voltage levels align with the available bank configurations. Consider the spread spectrum requirements for EMI compliance and ensure the input reference source matches the supported crystal or clock frequency ranges.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the CY25404 family of quad PLL programmable clock generators. It is designed to replace multiple discrete oscillators and crystals, reducing board space and complexity. The device integrates nonvolatile memory for one-time programmability of frequencies and drive strengths.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other CY25404 variants with different temperature codes or packaging options. Verify pinout compatibility and electrical specifications when substituting with similar clock generator ICs from Infineon or other manufacturers.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency supported by the CY25404?

The device supports output clock frequencies ranging from 3 MHz to 166 MHz, depending on the supply voltage configuration.

Can the output voltage levels be changed independently of the main supply?

Yes, the three output driver banks can be powered by separate voltages of 1.8 V, 2.5 V, 3.0 V, or 3.3 V, independent of the main VDD supply.

How does the device handle frequency switching?

The CY25404 provides glitch-free frequency switching when using output dividers, ensuring continuous system operation without clock interruptions.