9FGV0441AKLFT

Overview

The Renesas 9FGV0441AKLFT is a PCI Express (PCIe) clock generator and fan-out buffer designed for Gen 1–4 applications. It features an integrated Phase-Locked Loop (PLL) with a crystal input, providing one circuit that generates up to five differential outputs at frequencies up to 100MHz. The device operates on a 1.7V to 1.9V supply voltage and utilizes LP-HCSL signaling with integrated 100Ω terminations. Packaged in a space-saving 32-VFQFPN (5x5mm) exposed pad format, it supports spread spectrum clocking to reduce EMI.

Feature Summary

• Integrated 100Ω differential output terminations reduce component count and board space.
• Supports selectable spread spectrum levels of 0%, -0.25%, or -0.5% to minimize electromagnetic interference.
• Programmable slew rate and output amplitude allow tuning for various line lengths and application environments.
• Differential outputs are blocked until the PLL locks, ensuring clean system startup.

Applications

• PCI Express (PCIe) Gen 1 through Gen 4 systems
• Server and workstation motherboard timing
• Storage subsystem clock distribution

Procurement Notes

Verify the package designation matches the 32-VFQFPN (5x5mm) specification. Confirm the operating temperature range requirements align with the 0°C to 70°C industrial rating. Ensure the design accommodates the 1.7V to 1.9V supply voltage constraints. Check for RoHS3 compliance status if required by specific regional regulations.

Selection Notes

Select this component when a low-power PCIe clock source with integrated termination is required. The 1:5 ratio suits designs needing multiple downstream receivers from a single reference. Consider the programmable slew rate feature if signal integrity tuning for specific trace lengths is necessary within the target environment.

Part Context

This part belongs to the 9FGV0441 family of very-low power clock generators. It serves as a specialized timing solution for high-speed serial interfaces, specifically optimized for the electrical requirements of modern PCIe standards while minimizing power consumption and physical footprint.

Replacement Considerations

Direct substitutes include other members of the 9FGV0441 series with compatible pinouts and specifications. Verify that any alternative maintains the 32-VFQFPN package dimensions and the 1.8V nominal supply voltage requirement.