CY25404ZXI241T

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY25404ZXI241T is a quad PLL programmable clock generator with spread spectrum capability, housed in a 20-pin TSSOP package. It supports input frequencies from 8 to 48 MHz via crystal or 8 to 166 MHz via external clock. The device generates up to nine independent output clocks within a range of 3 to 166 MHz (or 3 to 50 MHz at 1.8 V). It features four configurable PLLs, selectable VDD supply voltages of 2.5 V, 3.0 V, or 3.3 V, and independent output bank supplies of 1.8 V, 2.5 V, 3.0 V, or 3.3 V. Cycle-to-cycle jitter is typically 100 ps, with a PLL lock time of 13 ms.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Four fully integrated phase-locked loops enable the synthesis of multiple unrelated frequencies from a single reference source.
• Programmable spread spectrum functionality supports center and down modulation profiles for electromagnetic interference reduction.
• Glitch-free frequency switching ensures uninterrupted system operation during transitions between programmed clock rates.
• One-time programmability allows customization of PLL frequencies, drive strength, and output configurations.

Clock Generators, PLLs, Frequency Synthesizers Applications

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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging as per official documentation. Confirm that the 'I' designation corresponds to the industrial temperature range of -40 °C to +85 °C. Ensure the factory-programmed configuration matches the required application frequencies before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when multiple independent clock outputs are required from a single reference. Verify that the required output voltage levels align with the available bank supply options. Consider the spread spectrum requirements for EMI compliance and ensure the input frequency falls within the supported crystal or external clock ranges.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the CY25404 family of quad PLL clock generators. The 'ZXI' prefix denotes the 20-pin TSSOP package and industrial temperature rating. The 'T' suffix specifies tape and reel packaging. This series is designed for applications requiring flexible clock synthesis with low jitter and EMI mitigation capabilities.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Check for other CY25404 variants with different temperature ratings or packaging options if availability is an issue. Ensure any substitute maintains the quad PLL architecture and spread spectrum features required by the design.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency supported by the CY25404?

The device supports output frequencies up to 166 MHz when operating with VDD_CLK_Bx supplies of 2.5 V, 3.0 V, or 3.3 V. At 1.8 V, the maximum output frequency is limited to 50 MHz.

How does the device handle frequency switching?

The CY25404 provides glitch-free frequency switching when using output dividers. This feature allows the system to change clock frequencies without causing interruptions or errors in connected logic.

Can the output drive strength be adjusted?

Yes, the DC drive strength of individual clock outputs is programmable. Settings include Low, Mid Low, Mid High, and High, which correspond to typical rise/fall times of 6.8 ns, 3.4 ns, 2.0 ns, and 1.0 ns respectively.