CY28442ZXC-2T

Application Specific Clock/Timing Overview

The CY28442ZXC-2T is a clock generator IC designed for Intel Alviso chipset platforms, supporting Pentium-M CPUs. It operates on a single 3.3V supply (3.135V to 3.465V) within an ambient temperature range of 0°C to 85°C. The device features a 3:20 input-to-output ratio and includes one PLL. It provides differential CPU clock pairs, 100 MHz differential SRC clocks, a 96 MHz dot clock, 48 MHz USB clocks, and a 33 MHz PCI clock. Outputs include HCSL and LVCMOS types, with inputs accepting LVTTL or crystal signals. The component is housed in a 56-pin TFSOP package.

Application Specific Clock/Timing Feature Summary

• Compliant with Intel CK410M specifications and supports Intel Pentium-M CPU architectures.
• Features spread-spectrum capability for 96/100 MHz differential clocks to reduce electromagnetic interference.
• Includes I2C support with readback capabilities for flexible configuration via serial data interface.
• Provides individually stoppable SRC clocks controlled by CLKREQ# inputs.

Application Specific Clock/Timing Applications

• Intel Alviso Chipset systems
• Intel Pentium-M CPU server applications

Application Specific Clock/Timing Procurement Notes

Verify the part status as discontinued before procurement planning. Confirm that the 56-TFSOP package dimensions match the design footprint. Ensure the specific revision *B datasheet aligns with the manufactured unit's date code. Check for moisture sensitivity level 1 requirements during storage and handling.

Application Specific Clock/Timing Selection Notes

Select this component for designs requiring specific Intel Alviso timing compliance. Ensure the external crystal matches the parallel resonance requirement to maintain ppm specifications. Verify that the host system can provide the necessary VTT_PWRGD# signal for sampling frequency select inputs. Confirm power supply stability within the 3.135V to 3.465V range.

Application Specific Clock/Timing Part Context

This part belongs to the CY28442 family of clock generators. It is specifically tailored for legacy Intel mobile processor platforms. The ZXC-2T suffix indicates the specific package type and tape/reel packaging configuration. It serves as a central timing solution for chipset synchronization.

Application Specific Clock/Timing Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the part status is listed as discontinued, alternative solutions require manual verification of pin compatibility and electrical parameters against target system requirements.