{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"49FCT3805AQG","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"49FCT3805AQG","canonicalUrl":"https://icboms.com/renesas/49FCT3805AQG","factsUrl":"https://icboms.com/api/mcp/products/49FCT3805AQG","rawCanonicalId":null},"summary":{"shortDescription":"Renesas 49FCT3805AQG, 49FCT series, Fanout Buffer (Distribution), 1:5 input-output ratio, 3V–3.6V supply, CMOS/LVTTL IO, 20-QSOP package, active lifecycle.","salesMarkdown":"## Two independent 1:5 fanout paths for 3.3V clock trees The 49FCT3805AQG is a Renesas fanout buffer with two independent circuits, each splitting one input into five outputs — ten total from two inputs. This part fits 3.3V clock distribution where you need separate buffered copies of two clock sources, like splitting a reference clock to multiple PLLs or ASICs on the same board. ## Single-ended IO limits the signal-integrity budget Both input and output are non-differential (No/No), so the part cannot reject common-mode noise the way an LVPECL or LVDS buffer does. For long traces or noisy environments, the 49FCT3805AQG needs careful layout — keep the trace impedance controlled and the return path short. Compare with the 8SLVP1104ANLGI, which offers differential LVPECL outputs at 2 GHz but runs a single circuit at 1:4 ratio and needs a 3.135V supply. The 49FCT3805AQG gives you two circuits at 1:5 but tops out at lower frequency and lacks differential drive. ## Active production — no obsolescence risk for this BOM line That's a common footprint — the 0.025-inch pitch QSOP is widely second-sourced. ## Commercial temp grade — keep it indoors Rated 0°C to 70°C, the 49FCT3805AQG is specified for commercial environments: office networking gear, test equipment, or telecom racks in climate-controlled rooms. Not for outdoor, under-hood, or extended-temperature industrial use.","metaTitle":"49FCT3805AQG Fanout Buffer Distribution IC – Renesas 20-QSOP","metaDescription":"Active Renesas 49FCT3805AQG fanout buffer, 1:5 ratio, 3V–3.6V supply, CMOS/LVTTL IO, 20-QSOP. Sourced per RFQ for BOM fill or repair.","metaKeywords":null},"attributes":{"series":"49FCT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"Type":"Fanout Buffer (Distribution)","Input":"CMOS, LVTTL","Output":"CMOS, LVTTL","Series":"49FCT","Package":"Tube","Mounting Type":"Surface Mount","Package / Case":"20-SSOP (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Number of Circuits":"2","Ratio - Input:Output":"1:5","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"20-QSOP","Differential - Input:Output":"No/No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.26","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.26000","currency":"USD"},{"qty":10,"price":"$1.12600","currency":"USD"},{"qty":25,"price":"$1.06840","currency":"USD"},{"qty":100,"price":"$0.87770","currency":"USD"},{"qty":250,"price":"$0.82044","currency":"USD"},{"qty":500,"price":"$0.72504","currency":"USD"},{"qty":1000,"price":"$0.60120","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/08fdeaeeaed648516dd3aed7937ad9b9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can 49FCT3805AQG replace a differential-output fanout buffer?","answer":"No — it's single-ended CMOS/LVTTL only. If your downstream device expects LVPECL or LVDS levels, you need a differential buffer like the 8SLVP1104ANLGI."},{"question":"What does the 1:5 ratio mean for my clock tree?","answer":"Each of the two circuits takes one input and drives five outputs. That gives you ten buffered copies from two clock sources — enough for moderate fan-out without adding a second buffer IC."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/49FCT3805AQG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/49FCT3805AQG 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}}