9FGL0651BKILFT

Overview

The 9FGL0651BKILFT is a six-output, 3.3V PCIe clock generator manufactured by Renesas Electronics Corporation. It supports PCIe Gen 1 through Gen 6 architectures, including Common Clocked (CC), Separate Reference Independent Spread (SRIS), and Separate Reference No Spread (SRNS). The device features integrated terminations for both 100Ω and 85Ω systems, reducing external component requirements. It operates with a single 25MHz crystal input and provides spread spectrum options of 0%, -0.25%, and -0.5%. Key specifications include LP-HCSL differential outputs, an LVCMOS reference output with Wake-On-LAN support, and operation within a -40°C to +85°C temperature range in a compact 4mm × 4mm 24-VFQFPN package.

Feature Summary

• Supports PCIe Gen 1–6 CC, SRIS, and SRNS clocking architectures
• Six differential LP-HCSL outputs with dedicated OE# pins for CLKREQ# functionality
• Integrated 100Ω and 85Ω termination resistors save four resistors per output
• SMBus-selectable spread spectrum levels: 0%, -0.25%, and -0.5%

Applications

• Servers and High-Performance Computing systems
• NVMe Storage solutions
• Networking Accelerators
• Industrial Control applications

Procurement Notes

Verify the manufacturer date code against current production status, as datasheet references indicate dates extending into 2026. Confirm package marking and pinout compatibility during integration. Ensure supply chain sources provide original manufacturer documentation to validate authenticity. Check for any specific PCNs regarding assembly site changes or material updates prior to procurement.

Selection Notes

Select this component when designing for multi-lane PCIe expansions requiring up to six synchronized clocks. It is suitable for systems needing flexible spread spectrum configuration via SMBus. Verify that the 25MHz crystal input frequency matches the system design. Consider the 24-VFQFPN footprint constraints and ensure thermal management aligns with the specified operating temperature range.

Part Context

This part belongs to the 9FGL02/04/06/08 family of PCIe clock generators, differentiated primarily by output count. The 9FGL0651 variant specifically addresses high-density expansion needs compared to the 2-output (9FGL0251) or 4-output (9FGL0451) counterparts. It shares architectural similarities with the 9FGL6251 but offers higher output density for server and storage backplanes.

Replacement Considerations

Direct substitutes within the same family include the 9FGL0251BKILFT (2-output) and 9FGL0451BKILFT (4-output) if fewer lanes are required. For NVMe-specific applications, the 9FGL6251BKILFT serves as an alternative with intelligent buffer capabilities. Verify pin-to-pin compatibility and software register settings when migrating between these variants.