9FGL0451DKILFT

Application Specific Clock/Timing Overview

The Renesas 9FGL0451DKILFT is a 3.3V PCIe Gen1-5 clock generator providing four differential outputs and one LVCMOS reference output. It operates at 100MHz with a 25MHz input frequency, housed in a 32-VFQFPN package (5x5mm). Key electrical specifications include 90fs RMS typical jitter for PCIe Gen5 Common Clocked mode, less than 50ps cycle-to-cycle jitter, and zero ppm synthesis error. The device supports integrated 85Ω or 100Ω terminations and features SMBus-selectable spread spectrum options.

Application Specific Clock/Timing Feature Summary

• Supports PCIe Gen1-5 Common Clocked (CC), Independent Reference (IR), SRIS, and SRNS architectures
• Includes integrated 85Ω or 100Ω termination resistors to reduce external component count
• Features OE# pins supporting PCIe CLKREQ# functionality for power management
• Provides SMBus-selectable spread spectrum settings (-0.25% or -0.5%) and clean switching

Application Specific Clock/Timing Applications

• Servers and High-Performance Computing systems
• NVMe storage solutions
• Networking equipment
• Hardware accelerators
• Industrial control systems

Application Specific Clock/Timing Procurement Notes

Verify the specific suffix 'KILFT' against the manufacturer's official documentation to confirm tape-and-reel packaging and RoHS compliance status. Ensure that the required spread spectrum configuration matches the pin-strapped defaults or SMBus programming capabilities defined in the datasheet.

Application Specific Clock/Timing Selection Notes

Select this model for designs requiring four differential PCIe clock outputs with integrated termination. Verify compatibility with the target PCIe generation's jitter requirements, specifically noting the 90fs RMS typical performance in CC mode. Confirm that the 32-VFQFPN package dimensions fit the PCB layout constraints.

Application Specific Clock/Timing Part Context

This component belongs to the 9FGL02x1/04x1/06x1/08x1D family of 3.3V PCIe clock generators. The '04' designation indicates four differential outputs, while the '51' variant typically specifies the -0.5% spread spectrum capability. It serves as a central timing source for high-speed serial interfaces compliant with PCI Express standards.

Application Specific Clock/Timing Replacement Considerations

Direct replacements within the same family include the 9FGL0441D for non-spread spectrum applications. Other variants like the 9FGL02x1D or 9FGL06x1D offer different output counts but share similar architectural features.