{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"9DBL411BKILF","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"9DBL411BKILF","canonicalUrl":"https://icboms.com/renesas/9DBL411BKILF","factsUrl":"https://icboms.com/api/mcp/products/9DBL411BKILF","rawCanonicalId":null},"summary":{"shortDescription":"Renesas 9DBL411BKILF, PCIe/QPI fanout buffer, 1:4 LP-HCSL, 150 MHz max, 3V–3.6V supply, -40°C to 85°C, 20-VFQFPN (4x4 mm), no PLL.","salesMarkdown":"## PCIe and QPI clock distribution without PLL phase noise The Renesas 9DBL411BKILF is a 1:4 differential fanout buffer designed for Intel QPI and PCI Express (PCIe) reference clock trees. It accepts an HCSL input and delivers four LP-HCSL outputs with a 1:4 fanout ratio, all without an internal PLL — meaning the output phase noise is set entirely by the source oscillator, with no PLL loop-bandwidth peaking or jitter accumulation from the buffer itself. Maximum frequency is 150 MHz. Differential input and output paths are fully differential (Yes/Yes). Supply range is 3V to 3.6V, and the operating temperature spans -40°C to 85°C, making it suitable for industrial and telecom environments where ambient temperature swings are a given. ## Lifecycle and sourcing The 9DBL411BKILF carries an Active product status and is ROHS3 compliant. For new designs or BOM maintenance, the part is available through independent distribution and can be quoted to order — no lead-time surprises from a phase-out. ## Why no PLL matters for your clock tree A PLL-based clock buffer introduces its own jitter from the VCO and loop filter. The 9DBL411BKILF has no PLL, so the output jitter is simply the input jitter plus the buffer's additive phase noise — typically well under 1 ps RMS for a clean HCSL source. If your ADC or SerDes is sensitive to deterministic jitter from PLL spurs, this buffer keeps the clock clean.","metaTitle":"9DBL411BKILF PCIe/QPI Fanout Buffer, 150 MHz, LP-HCSL","metaDescription":"9DBL411BKILF is a 1:4 LP-HCSL fanout buffer for PCIe and QPI clock distribution. No PLL. 150 MHz max, -40°C to 85°C, 20-VFQFPN. Active production, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"PLL":"No","Input":"HCSL","Output":"LP-HCSL","Package":"Tube","Main Purpose":"Intel QPI, PCI Express (PCIe)","Mounting Type":"Surface Mount","Package / Case":"20-VFQFN Exposed Pad","Frequency - Max":"150MHz","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Number of Circuits":"1","Ratio - Input:Output":"1:4","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"20-VFQFPN (4x4)","Differential - Input:Output":"Yes/Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.91","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.91000","currency":"USD"},{"qty":10,"price":"$3.51000","currency":"USD"},{"qty":25,"price":"$3.31800","currency":"USD"},{"qty":100,"price":"$2.87550","currency":"USD"},{"qty":250,"price":"$2.72800","currency":"USD"},{"qty":500,"price":"$2.44784","currency":"USD"},{"qty":1000,"price":"$2.06444","currency":"USD"},{"qty":2500,"price":"$1.96122","currency":"USD"},{"qty":5000,"price":"$1.88749","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/02f3f9b54c20719fb612bef7ea2d34d6.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum frequency of 9DBL411BKILF?","answer":"The maximum frequency is 150 MHz, which covers PCIe Gen1/2/3 reference clock rates and Intel QPI base frequencies. The buffer is not rated for 400 MHz PCIe Gen4/5 reference clocks."},{"question":"Is 9DBL411BKILF a PLL or fanout buffer?","answer":"It is a fanout buffer with no internal PLL. The PLL field is explicitly 'No', meaning the device is a zero-delay buffer that reproduces the input clock without frequency synthesis or loop-bandwidth filtering."},{"question":"What is the closest functional equivalent to 9DBL411BKILF?","answer":"The 9DBL411BGLFT is the same 1:4 LP-HCSL fanout buffer but rated for commercial temperature (0°C to 70°C) instead of the industrial -40°C to 85°C range. If your application stays above 0°C, the BGLFT is a drop-in alternate. For a PLL-based PCIe clock generator, the 9DB803DFLFT or 9ZXL0851EKKLF are different device classes — not direct replacements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/9DBL411BKILF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/9DBL411BKILF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}