CY25404ZXI239T

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY25404ZXI239T is a quad PLL programmable clock generator with spread spectrum capability, housed in a 20-pin TSSOP package. It supports industrial temperature ranges from -40°C to +85°C and operates on a VDD supply of 2.25V to 3.60V. The device features four independent PLLs capable of synthesizing output frequencies between 3 MHz and 166 MHz. Input references include crystals (8–48 MHz) or external clocks (8–166 MHz). Output drivers are grouped into three banks with selectable voltages of 1.8V, 2.5V, 3.0V, or 3.3V. It provides nine clock outputs with glitch-free frequency switching via eight selectable frequency sets.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Four fully integrated phase-locked loops enable the synthesis of up to four independent frequencies from a single reference source.
• Programmable spread spectrum modulation reduces electromagnetic interference using center or down spread profiles.
• Glitch-free frequency switching ensures uninterrupted system operation when changing clock rates via hardware select pins.
• Independent output driver banks allow flexible voltage level selection separate from the main power supply.

Clock Generators, PLLs, Frequency Synthesizers Applications

• PC motherboard clock distribution
• Consumer electronics timing generation
• Portable device synchronization
• Networking equipment clocking

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify that the ordering suffix matches the required temperature grade and packaging format. Confirm factory programming parameters align with specific design requirements before procurement. Ensure input crystal specifications meet the recommended motional resistance and load capacitance limits for stable oscillation.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when multiple independent clock frequencies are required from a single oscillator source. Verify that the target output voltage levels match the available bank settings. Ensure the application environment falls within the specified industrial temperature range and that EMI reduction features are necessary for the system design.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the CY25404 family of quad PLL clock generators. The 'ZXI' designation indicates the 20-pin TSSOP package variant with an industrial temperature rating. The 'T' suffix typically denotes tape and reel packaging, while the numeric suffix represents specific factory-programmed configuration data.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements must maintain the quad PLL architecture and 20-pin TSSOP footprint. Verify compatibility with existing crystal or external clock inputs. Ensure substitute devices support the required output voltage levels and spread spectrum modulation profiles for EMI compliance.