CYW320OXC-4T

Clock Generators, PLLs, Frequency Synthesizers Overview

The CYW320OXC-4T is a lead-free, tape-and-reel variant of the W320-04 clock synthesizer and driver manufactured by Silicon Laboratories. It operates within a commercial temperature range of 0°C to 70°C and utilizes a 56-pin SSOP package. The device generates multiple output clocks at different frequencies, including three pairs of differential CPU outputs up to 200 MHz, ten synchronous PCI clocks, six 3V66 clocks, two 48 MHz clocks, and one reference clock at 14.318 MHz. It supports spread spectrum clocking down-spread for EMI reduction and includes power-down features controlled by PCI_STOP#, CPU_STOP#, and PWR_DWN# inputs.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Compliant with Intel CK-Titan specifications for next-generation Pentium processors
• Generates differential CPU clocks (up to 200 MHz), PCI, 3V66, USB/DOT (48 MHz), and REF (14.318 MHz) outputs
• Supports Spread Spectrum Clocking (down spread) to reduce electromagnetic interference
• Includes SMBus interface for flexible configuration of clock buffers and power management

Clock Generators, PLLs, Frequency Synthesizers Applications

• Motherboard clock generators supporting multiple CPUs and chipsets
• Systems requiring AGP, DRCG reference, and Hub Link support
• USB host controllers and graphic controller interfaces
• ISA slots and I/O chip synchronization

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify that the ordering suffix 'T' confirms the Tape and Reel packaging format as specified in the datasheet. Confirm the 'CYW' prefix indicates the lead-free version of the W320-04 component. Ensure the operating environment remains within the commercial range of 0°C to 70°C. Cross-reference the 56-pin SSOP physical dimensions against the target PCB footprint.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when differential CPU clock drivers are required for Pentium-based architectures. Choose the CYW320OXC-4T over the standard W320-04H if automated surface-mount assembly via tape and reel is necessary. Verify that the 3.3V supply voltage range (3.135V to 3.465V) matches the system design. Ensure compatibility with the SMBus protocol if dynamic clock configuration is required.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part is the lead-free, tape-and-reel version of the W320-04. The 'CYW' prefix denotes the lead-free manufacturing process, while the '-4T' suffix specifies the 56-pin SSOP package type combined with tape-and-reel shipping. It belongs to the W320 family of clock synthesizers designed for high-performance PC motherboards.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The W320-04HT serves as the non-lead-free equivalent in tape-and-reel packaging. For TSSOP package requirements, consider the CYW320ZXC-4T. Ensure any replacement maintains the same 56-pin SSOP form factor and electrical characteristics.