9FGL6251AQ302LTGI

Overview

The 9FGL6251AQ302LTGI is a clock generator and buffer from the Renesas 9FGL6251 series, designed for PCIe applications. It features two differential LP-HCSL outputs with 85Ω impedance and integrated terminations. The device supports Common (CC) and Independent Reference (IR) architectures, defaulting to -0.5% Spread Spectrum Clocking (SSC) for SRIS/CC configurations. It operates on 2.5V or 3.3V supplies, accepts 25MHz or 33.33MHz reference clocks, and includes an SMBus-selectable -0.25% SSC option. The component is housed in a 28-VQFP-N package.

Feature Summary

• Intelligent detection of input clock presence with automatic mode switching
• Two 100MHz Low-power HCSL (LP-HCSL) outputs with 85Ω impedance
• Integrated DIF output terminations eliminating external resistors
• SMBus-selectable -0.25% Spread Spectrum Clocking (SSC)

Applications

• Single and dual-ported nVME SSDs
• PCIe master/slave clock multiplexing
• U.2 and M.2 form factor systems

Procurement Notes

Verify the specific suffix LTGI against the official datasheet to confirm the reel packaging configuration and moisture sensitivity level. Ensure the ordering quantity aligns with the manufacturer's standard reel size requirements. Cross-reference the RoHS status and lead-free category with current environmental compliance documentation before finalizing procurement.

Selection Notes

Select this model for designs requiring integrated output termination to reduce bill of materials. Verify compatibility with SRnS, IR, or CC PCIe clocking architectures. Confirm that the 85Ω output impedance matches the load requirements. Check if the default -0.5% SSC setting meets system jitter specifications or if SMBus configurability is required.

Part Context

This part belongs to the 9FGL6251 family of intelligent PCIe clock buffers and generators. The 'A' suffix typically denotes specific electrical characteristics or package variations within the series. The 'Q' indicates qualified automotive or industrial grade components, while '302' specifies the functional configuration for SRIS/CC architectures with -0.5% SSC.

Replacement Considerations

The 9FGL6251AQ202LTGI is a related variant within the same family, differing primarily in its default SSC configuration and potentially packaging. Verify pin-to-pin compatibility and electrical parameter alignment before substitution.