CY28346ZXC

Application Specific Clock/Timing Overview

The CY28346ZXC is a clock synthesizer designed for Intel CPU servers, compliant with the CK-408 specification. It generates three differential CPU clocks, ten PCI clocks, and multiple fixed-frequency outputs including 66 MHz and 48 MHz variants. The device operates on a 3.3V supply (3.135V to 3.465V) within an ambient temperature range of 0°C to 70°C. It supports input via crystal or external clock and features SMBus control for configuration.

Application Specific Clock/Timing Feature Summary

• Compliant with Intel CK-408 Mobile Clock Synthesizer specifications
• Generates three differential CPU clocks and ten PCI clock copies
• Includes Spread Spectrum EMI reduction capabilities
• Features Dial-a-Frequency™ and Dial-a-dB™ programmability via SMBus

Application Specific Clock/Timing Applications

• Intel CPU Servers
• Brookdale chipset systems
• 830M & 845 chipset platforms

Application Specific Clock/Timing Procurement Notes

Verify component authenticity through official Skyworks or Infineon channels. Confirm package integrity as the device utilizes a 56-pin TSSOP II form factor. Check for moisture sensitivity indicators prior to surface mount assembly. Ensure power supply sequencing adheres to the datasheet requirements for reliable operation.

Application Specific Clock/Timing Selection Notes

Select this model for applications requiring CK-408 compliance and differential CPU clock outputs. Verify that the operating environment stays within the 0°C to 70°C commercial temperature range. Ensure the design accommodates the 3.3V power supply constraints and utilizes the SMBus interface for frequency selection if hardware pins are insufficient.

Application Specific Clock/Timing Part Context

Originally manufactured by Cypress Semiconductor, this part is now under the Infineon Technologies portfolio following acquisition. The CY28346 series serves as a specialized clock generator for legacy Intel mobile and desktop architectures, providing synchronized timing signals for processors and peripheral buses.

Application Specific Clock/Timing Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.