{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"9DBL411BGILFT","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"9DBL411BGILFT","canonicalUrl":"https://icboms.com/renesas/9DBL411BGILFT","factsUrl":"https://icboms.com/api/mcp/products/9DBL411BGILFT","rawCanonicalId":null},"summary":{"shortDescription":"Renesas 9DBL411BGILFT, 1:4 differential clock fanout buffer, PLL No, Input HCSL, Output LP-HCSL, 150 MHz max, 3V-3.6V supply, -40°C to 85°C, 20-TSSOP.","salesMarkdown":"## What this clock buffer is and where it fits The Renesas 9DBL411BGILFT is a 1:4 differential clock fanout buffer designed for Intel QPI and PCI Express (PCIe) reference clock distribution. It takes a single HCSL input and delivers four LP-HCSL outputs, with no PLL in the path — meaning zero added jitter and a fixed, deterministic propagation delay. The part is specified for 150 MHz maximum frequency, covering PCIe Gen 1–3 and QPI clock rates with headroom. It operates from a 3 V to 3.6 V supply and is rated over the industrial temperature range of -40°C to 85°C, making it a fit for outdoor telecom and industrial backplane environments. ## Why the PLL-less architecture matters Because the 9DBL411BGILFT contains no PLL, it does not introduce cycle-to-cycle jitter or phase noise from a VCO. This is a deliberate design choice for applications where the upstream clock source already meets the jitter budget — typically a dedicated oscillator or PLL already on the board. The buffer simply fans out the clean clock to four loads, preserving the signal integrity. The trade-off is that it cannot synthesize a new frequency or clean up a noisy input; it is a pure fanout device. ## LP-HCSL output: lower power, same signal swing The outputs use Low-Power HCSL (LP-HCSL), which maintains the same differential voltage swing as standard HCSL but at reduced current consumption. This is relevant for PCIe clock trees where multiple fanout buffers may be cascaded; the power savings add up. The differential input and output are both rated Yes/Yes, meaning the part can be used in fully differential signal chains without single-ended conversion. ## Package and temperature grade for the board Housed in a 20-TSSOP package (4.40 mm width), the device is surface-mount and occupies minimal board area. The industrial temperature range (-40°C to 85°C) distinguishes it from the commercial-grade 9DBL411BGLFT variant, which is only rated 0°C to 70°C. For designs that must survive cold starts or outdoor enclosures, the 'GILFT' suffix is the correct choice. ## Lifecycle and sourcing The 9DBL411BGILFT is listed as Active in production and ROHS3 compliant.","metaTitle":"Renesas 9DBL411BGILFT Clock Fanout Buffer, 150 MHz, LP-HCSL","metaDescription":"Renesas 9DBL411BGILFT 1:4 differential clock fanout buffer. HCSL input, LP-HCSL output, 150 MHz max, -40 to 85°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"No","Input":"HCSL","Output":"LP-HCSL","Package":"Tape & Reel (TR); Cut Tape (CT)","Main Purpose":"Intel QPI, PCI Express (PCIe)","Mounting Type":"Surface Mount","Package / Case":"20-TSSOP (0.173\\\", 4.40mm Width)","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-TSSOP","Differential - Input:Output":"Yes/Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.31","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.31000","currency":"USD"},{"qty":10,"price":"$3.87000","currency":"USD"},{"qty":25,"price":"$3.65880","currency":"USD"},{"qty":100,"price":"$3.17090","currency":"USD"},{"qty":250,"price":"$3.00828","currency":"USD"},{"qty":500,"price":"$2.69932","currency":"USD"},{"qty":1000,"price":"$2.27654","currency":"USD"},{"qty":3000,"price":"$2.16271","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/02f3f9b54c20719fb612bef7ea2d34d6.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent to 9DBL411BGILFT?","answer":"The closest functional equivalent is the 9DBL411BGLFT, which shares the same pinout, 1:4 fanout, and LP-HCSL outputs, but is rated for commercial temperature (0°C to 70°C) rather than the industrial range of the 'GILFT' variant. For applications requiring a PLL, the 9DB803DFLFT or 9ZXL0851EKKLF are different device classes and not direct substitutes."},{"question":"Is 9DBL411BGILFT compatible with PCIe?","answer":"Yes, the part is designed for PCI Express (PCIe) reference clock distribution, with HCSL input and LP-HCSL output at up to 150 MHz, covering PCIe Gen 1 through Gen 3 requirements."},{"question":"How to use 9DBL411BGILFT as a clock buffer?","answer":"Connect a single HCSL clock source to the input; the device fans it out to four LP-HCSL outputs. Because there is no PLL, no external loop filter or configuration pins are needed — the part is a simple 1:4 fanout with differential I/O."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/9DBL411BGILFT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/9DBL411BGILFT 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}}