9FGL0251BKILFT

Overview

The 9FGL0251BKILFT is a PCIe Gen 1–6 compliant clock generator manufactured by Renesas Electronics Corporation. It features two differential LP-HCSL outputs and one LVCMOS reference output, operating at a fixed frequency of 25 MHz with a 3.3V supply voltage. The device supports Common Clocked (CC), Separate Reference No Spread (SRNS), and Separate Reference Independent Spread (SRIS) architectures. Integrated terminations for 100Ω and 85Ω systems reduce external component requirements. It is housed in a compact 4mm × 4mm 24-VFQFPN package with an exposed pad, designed for high-performance computing and server applications.

Feature Summary

• PCIe Gen 1–6 CC-compliant with support for SRNS and SRIS clocking architectures
• Integrated 100Ω and 85Ω termination resistors to save board space
• Pin-selectable spread spectrum levels: 0%, -0.5%, and SMBus-selectable -0.25%
• Dedicated OE# pins on each output supporting PCIe CLKREQ# functionality

Applications

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

Procurement Notes

Verify the exact suffix 'B' against official Renesas documentation, as standard listings often use 'CKILFT'. Confirm current lifecycle status, as related models like the CKILFT variant are marked as obsolete. Ensure compatibility with required spread spectrum configurations before procurement.

Selection Notes

Select this component for designs requiring PCIe Gen 1 through Gen 6 clock generation with low jitter compliance. The integrated terminations simplify layout for both 100Ω and 85Ω systems. Verify that the 25MHz input crystal frequency matches the system design requirements.

Part Context

This part belongs to the VersaClock 6 family of PCIe clock generators. It shares architectural similarities with other models in the 9FGL02x1 series, offering similar pinouts and functionalities but potentially differing in specific electrical parameters or packaging options.

Replacement Considerations

Direct substitutes within the same family include the 9FGL0241 and 9FGL0251 variants. Check datasheets for pin-to-pin compatibility and verify if the specific 'B' suffix denotes a unique configuration or package variation compared to standard versions.