9FGL6251AQ201LTGI8

Overview

The 9FGL6251AQ201LTGI8 is an intelligent PCIe clock buffer and generator manufactured by Renesas Electronics. Designed for NVMe SSD applications, it supports Common (CC) and Independent Reference (IR) clocking architectures. The device features two differential LP-HCSL outputs with integrated 85Ω terminations, eliminating the need for external resistors. It operates at 3.3V or 2.5V supply voltages with a 1.8V reference supply. The component accepts 25MHz or 33.33MHz reference clocks and includes automatic input clock detection and mode switching capabilities.

Feature Summary

• Intelligent PCIe Clock Buffer/Generator tailored for single and dual-ported NVMe SSDs
• Supports CC, SRnS (IR), and CC/SRIS clocking architectures with SMBus-selectable spread spectrum options
• Two 100MHz Low-power HCSL (LP-HCSL) outputs with integrated 85Ω termination resistors
• Integrated crystal option available in Q suffix variants; REF clock output saves external XO

Applications

• Single and dual-ported NVMe SSDs
• U.2 and M.2 form factor storage devices
• PCIe master/slave clocking applications
• Clock multiplexing systems

Procurement Notes

Verify the specific suffix 'Q' indicates the integrated crystal option when sourcing this part number. Confirm the package type matches the design requirements, as the 9FGL6251 series is available in both 28-VQFP-N and 28-LGA packages depending on the variant. Ensure compatibility with the target system's voltage levels, specifically the 2.5V or 3.3V VDD and 1.8V VDDREF requirements.

Selection Notes

Select this component for designs requiring low power consumption and reduced board space due to integrated terminations. The Q suffix variant is suitable for applications preferring an internal crystal oscillator over an external one. Verify that the required spread spectrum configuration (0%, -0.5%, or -0.25%) aligns with the PCIe specification compliance needs of the target architecture.

Part Context

This part belongs to the 9FGL6251 family of intelligent clock generators. It serves as a root part for various configurations including 31, 41, and 51 variants. The device is designed to replace discrete clock generation solutions, offering simplified AC coupling to other logic families and support for wake-on-lan functionality through its LVCMOS REF output.

Replacement Considerations

For devices requiring 100Ω output impedance instead of 85Ω, consider the 9FGL6241 series. Other members of the 9FGL6251 family may offer different pin configurations or feature sets; verify electrical parameters before substitution.