CY28329ZXC

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY28329ZXC is a 133-MHz spread spectrum clock synthesizer and driver manufactured by Infineon Technologies, housed in a 56-pin TSSOP package. It provides four pairs of differential CPU outputs up to 133 MHz, ten synchronous PCI clocks, three free-running PCI_F clocks, six 3V66 clocks, two 48-MHz clocks (USB/DOT), one 14.318-MHz reference clock, and one VCH clock. Operating at 3.3V with a supply range of 3.135V to 3.465V, it supports SMBus configuration for output enablement and spread spectrum control.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Supports multiple output frequencies including differential CPU clocks and standard PCI/PCIe compatible signals
• Features spread spectrum clocking capability to reduce electromagnetic interference
• Includes power-down modes controlled by PD# and PCI_STOP# inputs for ACPI compliance
• Offers flexible frequency selection via hardware pins and an SMBus serial interface

Clock Generators, PLLs, Frequency Synthesizers Applications

• Motherboard clock generation supporting multiple CPUs and chipsets
• System designs requiring support for AGP, Hub Link, and USB host controllers
• Industrial or commercial systems needing EMI reduction through spread spectrum techniques

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the component origin as Infineon Technologies, noting its historical lineage from Cypress Semiconductor. Confirm the specific ZXC suffix corresponds to the 56-pin Thin Small Outline Package (TSSOP). Ensure the device meets RoHS compliance standards if required for your assembly process. Check for any obsolescence notices or lifecycle status updates directly from the manufacturer before finalizing procurement plans.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing systems requiring a single-chip solution for generating diverse clock domains including high-speed differential CPU clocks and standard PCI interfaces. The integrated spread spectrum feature makes it suitable for applications with strict EMI regulations. Ensure the design accommodates the 56-pin TSSOP footprint and provides adequate decoupling for the multiple independent power supplies required by the different output sections.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This device belongs to the CY28329 series of clock synthesizers designed primarily for PC motherboard architectures. It integrates functions typically handled by multiple discrete components, simplifying board layout. The part is specifically optimized for Intel-based platforms, providing the necessary timing signals for processors, memory controllers, and peripheral buses within a compact surface-mount package.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other CY28329 variants such as CY28329ZC (standard SSOP) or CY28329OXC (lead-free SSOP). For pin-compatible upgrades, verify if newer Infineon clock generators offer similar output configurations and spread spectrum capabilities while maintaining the same package dimensions and electrical characteristics.