9ZXL0851EKKLF

Overview

The Renesas 9ZXL0851EKKLF is an 8-output low-power clock buffer designed for Intel DB800ZL specifications. It supports PCIe Gen 1/2/3 and QPI/UPI applications with a maximum frequency of 400 MHz. The device features LP-HCSL outputs and HCSL input, operating on a single 3.3V supply (3.135V to 3.465V). Packaged in a 48-pin VFQFPN, it offers zero-delay buffering via fixed feedback paths and includes PLL de-jittering capabilities.

Feature Summary

• 8 differential LP-HCSL outputs with low power consumption
• Zero-delay operation with <65 ps output-to-output skew
• Supports PCIe Gen 1/2/3 and QPI/UPI standards
• Integrated PLL for jitter reduction in bypass or PLL modes

Applications

• PCI Express Gen 1/2/3 clock distribution
• Intel QuickPath Interconnect (QPI) systems
• Ultra Path Interconnect (UPI) architectures
• High-performance server and computing platforms

Procurement Notes

Verify the suffix 'K' indicates tray packaging versus 'I' for tape-and-reel. Confirm RoHS compliance status through official Renesas documentation. Check current lifecycle status as distributors may list obsolete or end-of-life variants. Ensure moisture sensitivity level (MSL 3) handling protocols are followed during assembly.

Selection Notes

Select this component when an 8-channel fanout buffer meeting Intel DB800ZL requirements is needed. Choose over the 9ZXL0831E if specific pin-compatible performance characteristics align with the design. Verify that the 400 MHz maximum frequency covers the target system clock rates. Ensure the 48-VFQFPN package fits the PCB footprint constraints.

Part Context

This part belongs to the 9ZXL08x1E family of low-power clock buffers. It serves as a direct replacement or upgrade for previous generation DB800ZL compliant buffers. The device integrates fixed feedback loops to minimize drift, distinguishing it from standard fanout buffers that require external feedback components.

Replacement Considerations

The 9ZXL0831E is a pin-compatible alternative within the same family. Verify electrical parameter differences such as jitter performance and power consumption before substitution. Ensure the replacement matches the required output count and signaling standards.