9DBL411BKLFT

Overview

The 9DBL411BKLFT is a single-circuit, four-output fanout buffer manufactured by Renesas Electronics Corporation. Designed for Intel QPI and PCI Express (PCIe) applications, it accepts an HCSL differential input and provides four LP-HCSL differential outputs. The device operates at a maximum frequency of 150MHz with a supply voltage range of 3V to 3.6V. It features individual output enable pins and lacks an internal PLL. The component is housed in a 20-VFQFPN package with exposed pad, suitable for surface mount installation within an operating temperature range of 0°C to 70°C.

Feature Summary

• Four-output lower power differential buffer with individual OE# pins
• Supports Intel QPI and PCIe Gen1-2-3 standards
• Converts HCSL input to LP-HCSL differential output signaling
• Maximum operating frequency of 150MHz

Applications

• PCI Express clock distribution
• Intel QuickPath Interconnect (QPI) systems
• High-speed server and storage backplanes

Procurement Notes

Verify the RoHS3 compliance status and ensure the specific suffix KLFT corresponds to the required tape and reel packaging quantity of 2,500 units. Confirm that the commercial temperature range (0°C to 70°C) meets the design requirements, as industrial variants like the BKILFT offer extended temperature ranges.

Selection Notes

Select this component when a low-power, non-programmable fanout buffer is required for PCIe or QPI interfaces. Ensure the system design accommodates the 3V to 3.6V supply voltage. If spread spectrum clocking support is needed, verify compatibility with the HCSL input stage, as the datasheet indicates acceptance of spread spectrum inputs.

Part Context

This part belongs to the 9DBL411 family of four-output differential buffers. Variants such as the 9DBL411AKLFT operate up to 400MHz but are discontinued. The 9DBL411BGILFT offers the same electrical performance but utilizes a 20-TSSOP package instead of the VFQFPN form factor found in the BKLFT version.

Replacement Considerations

The 9DBL411BKILFT is a verified manufacturer replacement offering an extended operating temperature range (-40°C to 85°C) while maintaining identical electrical specifications and pinout compatibility.