9ZX21501CKLF

Overview

The Renesas Electronics Corporation 9ZX21501CKLF is a clock distribution buffer designed for high-speed serial link applications. It features a single differential input and fifteen differential HCSL outputs, providing a 1:15 fan-out ratio. The device supports maximum frequencies of 400 MHz and operates within a supply voltage range of 3.135 V to 3.465 V. Integrated into the Z-Tech family, it utilizes a 64-VFQFPN (9x9) package with an exposed pad. The component includes an internal PLL and is optimized for Intel QPI and PCI Express architectures.

Feature Summary

• 15-output differential HCSL buffer with 1:15 input-to-output ratio
• Integrated Phase-Locked Loop (PLL) for clock generation and distribution
• Supports Intel QPI and PCI Express (PCIe) main-purpose applications
• Operates at frequencies up to 400 MHz with 3.135 V to 3.465 V supply

Applications

• Intel QuickPath Interconnect (QPI) systems
• PCI Express (PCIe) clock distribution networks
• High-performance server and storage controller boards

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with RoHS3 standards and Moisture Sensitivity Level 3 requirements during handling. Confirm that the 64-VFQFPN footprint matches the target PCB design guidelines.

Selection Notes

Select this component when a 1:15 fan-out solution with integrated PLL is required for PCIe or QPI interfaces. The 400 MHz frequency limit and HCSL output signaling define its suitability for Gen 1 through Gen 4 speeds. Consider the 64-VFQFPN package dimensions and thermal pad requirements for proper mounting and heat dissipation in dense layouts.

Part Context

This part belongs to the Renesas Z-Tech clock buffer family, which provides low-jitter solutions for high-speed digital interfaces. The 9ZX21501 variant specifically addresses the need for distributing reference clocks to multiple endpoints in complex system-on-chip designs.

Replacement Considerations

Check for direct pin-compatible alternatives within the same Z-Tech series that offer different output counts or packaging options. Verify electrical parameter equivalence, particularly regarding output drive strength and jitter performance, before substituting.