9FGL6251AQ301LTGI8

Overview

The 9FGL6251AQ301LTGI8 is a PCIe clock generator and buffer from the Renesas 9FGL6251 series, designed for NVMe SSD applications. It features two differential LP-HCSL outputs with integrated terminations. The device supports Common Clocked (CC) and Separate Reference Independent Spread (SRIS) architectures. It accepts 25 MHz or 33.33 MHz reference clocks and operates at 3.3V supply voltage. The component is housed in a 4mm x 4mm 28-VQFPN package.

Feature Summary

• Intelligent detection of input clock presence with automatic mode switching
• Integrated crystal option available for Q-suffix variants
• Two 100MHz low-power HCSL outputs with 85Ω integrated termination resistors
• SMBus-selectable -0.25% spread spectrum capability

Applications

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

Procurement Notes

Verify the specific suffix LTGI8 against the manufacturer's current datasheet to confirm pinout and electrical characteristics. Ensure the ordering quantity aligns with the factory reel packaging requirements specified by Renesas Electronics. Check moisture sensitivity level handling procedures prior to assembly.

Selection Notes

Select this model for NVMe designs requiring CC or SRIS clocking architectures. The 'Q' suffix indicates an integrated crystal option, while 'A' denotes specific configuration settings. Verify that the 85Ω output impedance matches the PCB trace design requirements for the target application.

Part Context

This part belongs to the 9FGL6251 family of intelligent PCIe clock buffers. It serves as a root component for various configurations including 31, 41, and 51 variants. The series is optimized for high-performance computing and storage networking accelerators.

Replacement Considerations

Consult the official Renesas cross-reference guide for verified substitutes. Generic clock generators may lack the intelligent input detection and specific PCIe compliance features required for NVMe implementations.