CY28442ZXC-2

Application Specific Clock/Timing Overview

The CY28442ZXC-2 is a clock generator IC designed for Intel Alviso chipset applications, supporting Pentium-M CPUs. It features an integrated PLL and operates on a 3.3V supply (3.135V–3.465V) within a 56-pin TSSOP package. The device generates multiple differential and single-ended outputs including CPU clocks, 100-MHz serial reference clocks, 96/100-MHz dot clocks, 48-MHz USB clocks, and a 33-MHz PCI clock. It supports spread spectrum clocking for EMI reduction and allows frequency selection via hardware pins or SMBus interface.

Application Specific Clock/Timing Feature Summary

• Compliant with Intel CK410M specification for Alviso chipsets
• Generates selectable CPU frequencies up to 200 MHz with differential pairs
• Includes 100-MHz differential SRC clocks, 96/100-MHz dot clock, and 48-MHz USB clock
• Supports I2C/SMBus interface for register configuration and readback capabilities

Application Specific Clock/Timing Applications

• Intel Alviso Chipset systems
• Intel Pentium-M CPU platforms
• Flat-panel display clock generation

Application Specific Clock/Timing Procurement Notes

Verify the specific suffix 'ZXC-2' against manufacturer documentation to confirm pinout and electrical compatibility with the base CY28442 series. Confirm that the 56-TSSOP package matches the target PCB footprint. Ensure the source component meets RoHS standards if required by the assembly process.

Application Specific Clock/Timing Selection Notes

Select this component for designs requiring Intel Alviso compliance and support for Pentium-M processors. Ensure the design accommodates the 56-pin TSSOP package dimensions. Verify that the system power supply remains within the 3.135V to 3.465V range for proper operation of the internal PLL and output drivers.

Application Specific Clock/Timing Part Context

This part belongs to the CY28442 family of clock synthesizers originally developed by Cypress Semiconductor Corporation, now part of Infineon Technologies. The CY28442-2 variant is specifically optimized for mobile processor platforms, providing the necessary clock tree for chipset and peripheral synchronization in legacy mobile computing architectures.

Application Specific Clock/Timing Replacement Considerations

Check for direct replacements within the CY28442 family. Verify if newer revisions of the datasheet indicate any functional changes or obsolescence notices from Infineon. Ensure any substitute maintains the 56-pin TSSOP form factor and compatible voltage levels.