9DBL411AKLFT

Overview

The 9DBL411AKLFT is a clock distribution integrated circuit manufactured by Renesas Electronics Corporation, designed for high-speed data transmission applications. It functions as a PCIe fanout buffer with one differential input and four differential outputs. The device accepts HCSL input signals and provides LP-HCSL output signaling. It operates at a maximum frequency of 400MHz within a supply voltage range of 3.135V to 3.465V. The component is housed in a 20-VFQFN package with exposed pad and supports an operating temperature range from 0°C to 70°C.

Feature Summary

• Four-output differential buffer supporting PCIe Gen1-3 standards
• Maximum operating frequency of 400MHz
• HCSL input to LP-HCSL output conversion
• Individual Output Enable (OE#) pins for each output

Applications

• PCI Express (PCIe) clock distribution
• CPU clock fanout buffering
• High-speed server and storage systems

Procurement Notes

Verify the current lifecycle status of the 9DBL411AKLFT before procurement, as it may be subject to discontinuation notices. Confirm that the 20-VFQFN package dimensions and pinout match the target PCB footprint. Ensure the design accommodates the specific 3.135V to 3.465V supply voltage requirements and thermal dissipation needs for the VFQFPN(4x4) package.

Selection Notes

Select this component when a 400MHz PCIe fanout buffer is required. Compare against the 9DBL411BKLFT if a lower 150MHz frequency is sufficient, as the B-series variant offers a wider 3V to 3.6V supply range. Verify compatibility with HCSL sources and LP-HCSL loads. Check for alternative packages if the 20-VFQFN form factor is not suitable for the assembly process.

Part Context

The 9DBL411AKLFT belongs to the 9DBL411 family of low-power differential buffers from Renesas. This family includes variants like the 9DBL411BKILFT, which adds power-down features and extended temperature ranges. The 'A' suffix typically denotes specific performance or packaging variations within the base 9DBL411 product line focused on PCIe applications.

Replacement Considerations

The 9DBL411BKLFT is listed as a manufacturer-recommended replacement. Note that the BKLFT variant has a lower maximum frequency of 150MHz but supports a broader supply voltage range of 3V to 3.6V. Verify if the reduced speed meets system timing requirements.