CY28326OXC

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY28326OXC is a clock generator IC designed for VIA PT880 serial chipset applications. It supports P4 CPUs and operates on a 3.3V power supply. The device generates ten copies of PCI clocks, one 48 MHz USB clock, two copies of 25 MHz SRC/LAN clocks, and one programmable SIO clock (48 MHz/24 MHz). It provides three differential CPU clock pairs and includes SMBus support with Byte Write/Block Read/Write capabilities. Features include Spread Spectrum EMI reduction, Dial-A-Frequency, and Auto Ratio functions. The component is housed in a 48-pin SSOP package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates multiple synchronized clock outputs including PCI, USB, SRC/LAN, and programmable SIO frequencies.
• Provides three differential CPU clock pairs for processor interface requirements.
• Integrates SMBus interface supporting Byte Write and Block Read/Write operations.
• Includes Spread Spectrum EMI reduction technology to minimize electromagnetic interference.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Clock generation for VIA PT880 serial chipset systems
• Supporting P4 CPU platform timing requirements
• PCI bus clock distribution in desktop motherboards

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the manufacturer designation carefully, as public documentation lists SpectraLinear as the manufacturer for this part number despite the query specifying Cypress Semiconductor Corp. Confirm the exact suffix 'OXC' against official datasheets to ensure pinout and electrical specifications match the intended design implementation before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing for VIA PT880 chipsets requiring specific PCI and CPU clock configurations. Ensure the system design accommodates the 48-pin SSOP package dimensions. Verify that the 3.3V supply voltage aligns with the target board's power rails and that SMBus connectivity is required for configuration.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to a family of clock generators targeting specific legacy chipset architectures. While often associated with broader semiconductor portfolios, the specific documentation for CY28326 identifies it as an FTG solution for VIA platforms. It serves as a specialized timing source rather than a general-purpose oscillator.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided reference material. Cross-referencing should be performed using compatible clock generators from SpectraLinear or other vendors that support VIA PT880 specifications and offer identical pinouts and output configurations.