9DBL411BKLF

Overview

The Renesas 9DBL411BKLF is a low-power differential clock buffer designed for Intel QPI and PCI Express applications. It features one HCSL differential input and four LP-HCSL differential outputs, providing a 1:4 fanout ratio without an internal PLL. The device operates at frequencies up to 150MHz with a supply voltage range of 3V to 3.6V. Packaged in a 20-VFQFN (4x4mm) format with an exposed pad, it supports surface-mount installation and functions within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Four-output differential buffer with independent output enable pins
• Converts HCSL input signals to lower power LP-HCSL outputs
• Supports spread spectrum clocking inputs
• Typical power consumption of 132mW

Applications

• Intel QuickPath Interconnect (QPI) clock distribution
• PCI Express (PCIe) Gen1/Gen2/Gen3 clock buffering
• CPU clock fanout circuits

Procurement Notes

Verify the specific suffix 'BKLF' against the manufacturer datasheet to confirm package type and temperature grade. Confirm RoHS3 compliance status as required by project specifications. Check current availability through authorized distributors, noting that standard packaging quantities may apply.

Selection Notes

Select this component when a 1:4 fanout is required for PCIe or QPI interfaces using HCSL/LP-HCSL signaling. Ensure the design accommodates the 20-VFQFN footprint and thermal requirements. Verify that the operating frequency does not exceed 150MHz and that the supply voltage remains within the 3V to 3.6V range.

Part Context

This part belongs to the 9DBL411 family of low-power PCIe clock buffers. Variants such as 9DBL411AKLF offer higher frequencies up to 400MHz but are discontinued. Other variants like 9DBL411BKLFT provide the same electrical characteristics but differ in packaging format, typically utilizing tape-and-reel options instead of cut tape.

Replacement Considerations

The 9DBL411BKILFT is listed as a manufacturer-recommended alternative, offering similar functionality with an extended industrial temperature range (-40°C to 85°C). Verify pin compatibility and thermal performance before substitution.