ZL30291LDF1

Overview

The ZL30291 is a clock generator compliant with Intel CK440Q and PCIe Gen 1/2/3/4/5/6 specifications. It provides 19 low-power push-pull HCSL outputs, including seven dedicated 100 MHz, three dedicated 25 MHz, and nine selectable 25 MHz or 100 MHz channels. The device features ultra-low jitter of 80 fs maximum, programmable spread spectrum on 100 MHz outputs, and embedded source terminations for 85Ω differential lines. Operating at 3.3V ±10%, it supports SMBus and Side-Band Interface control, platform timing inputs/outputs, and an embedded LDO for power noise rejection within the -40°C to +85°C industrial temperature range.

Feature Summary

• Fully compliant with Intel CK440Q specification and PCIe Gen 1 through Gen 6 standards.
• Provides 19 low-power HCSL outputs: seven 100 MHz, three 25 MHz, and nine muxed 25/100 MHz.
• Ultra-low jitter performance with a maximum of 80 fs and output-to-output skew of 50 ps.
• Includes embedded source terminations matched for 85Ω differential transmission lines.

Applications

• PCIe Gen 1/2/3/4/5/6 clock generation
• Platform tuning for server architectures
• Intel QPI/UPI interconnects
• Servers, storage systems, and data centers
• Network switches and routers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's Product Identification System to confirm package type and tape/reel configuration. Ensure compatibility with the required supply voltage tolerance of 3.3V ±10% for PCIe electromechanical compliance. Confirm that the selected variant meets the industrial temperature range requirements of -40°C to +85°C for the target application environment.

Selection Notes

Select this component for designs requiring strict adherence to the Intel CK440Q standard for multi-CPU server platforms. The device supports up to eight CPUs when paired with ZL40292/294 buffers. Ensure the design utilizes the embedded 85Ω terminations correctly and accounts for the 3.3V ±10% power supply tolerance. Verify interface requirements for SMBus or Side-Band Interface control logic during system integration.

Part Context

The ZL30291 serves as a primary timing solution for high-performance computing environments defined by the Intel CK440Q specification. It replaces traditional discrete clocking solutions by integrating multiple output frequencies and platform timing functions into a single 100-lead UQFN package. This consolidation reduces board space and simplifies layout for complex server and networking topologies.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip Technology directly for cross-reference information or updated product lifecycle status regarding alternative components.