{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"49FCT3805AQG8","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"49FCT3805AQG8","canonicalUrl":"https://icboms.com/renesas/49FCT3805AQG8","factsUrl":"https://icboms.com/api/mcp/products/49FCT3805AQG8","rawCanonicalId":null},"summary":{"shortDescription":"Renesas 49FCT3805AQG8, 49FCT series Fanout Buffer (Distribution), 2 circuits, 1:5 input:output, CMOS/LVTTL, 3V-3.6V supply, 0°C-70°C, 20-QSOP surface mount.","salesMarkdown":"## What this 49FCT3805AQG8 clock buffer does on the board The Renesas 49FCT3805AQG8 is a fanout buffer — it takes one clock input and splits it to five outputs, cleanly, without the jitter or skew you get from daisy-chaining gates. Two independent 1:5 banks live in the same 20-QSOP package, so a single part can distribute two separate clock domains across ten loads. Input and output levels are CMOS and LVTTL, meaning it talks directly to the 3.3 V logic on your board without external translation. Supply range is 3 V to 3.6 V, which locks it into 3.3 V systems — not a 5 V or 1.8 V part. The commercial temperature grade (0°C to 70°C) suits it for office equipment, telecom racks, and indoor instrumentation, but not for an engine bay or a rooftop enclosure in winter. ## Two 1:5 banks — what that means for your clock tree Having two independent 1:5 buffers in one package saves board space and trace length. Each bank has its own input and five outputs, so you can feed a 25 MHz reference to five FPGA banks on one side and a 100 MHz Ethernet clock to five PHYs on the other, all from the same IC. The non-differential I/O (No/No) means this is a single-ended clock distribution part — no PECL or LVDS outputs, so keep it for standard CMOS/LVTTL fanout. ## Package and footprint notes for the rework bench The 20-QSOP (0.154\", 3.90 mm width) is a narrow-body SSOP derivative. It is surface-mount only, so no socket for field swapping — you will need a hot-air station or a fine-tip iron and some patience. The body is small enough that orientation marking is usually a pin-1 dot on top; check it under a loupe before placing. MSL is not in the record, but a common-sense bake at 125°C for 8 hours if the moisture-barrier bag is compromised is cheap insurance. ## Lifecycle and sourcing reality The 49FCT3805AQG8 carries an Active lifecycle status and ROHS3 compliance. No NRND or EOL flags, so it is still a valid line-item for new designs and production builds.","metaTitle":"49FCT3805AQG8 Fanout Buffer, 1:5, 3V-3.6V, 20-QSOP","metaDescription":"49FCT3805AQG8 clock buffer from Renesas (49FCT series). 2 circuits, 1:5 fanout, CMOS/LVTTL I/O, 3V-3.6V supply, 0°C-70°C. Active, ROHS3.","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":"Tape & Reel (TR); Cut Tape (CT)","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":"$1.19","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.19000","currency":"USD"},{"qty":10,"price":"$1.06200","currency":"USD"},{"qty":25,"price":"$1.00800","currency":"USD"},{"qty":100,"price":"$0.82800","currency":"USD"},{"qty":250,"price":"$0.77400","currency":"USD"},{"qty":500,"price":"$0.68400","currency":"USD"},{"qty":1000,"price":"$0.54000","currency":"USD"},{"qty":3000,"price":"$0.60120","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/08fdeaeeaed648516dd3aed7937ad9b9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is 49FCT3805AQG8 RoHS compliant?","answer":"Yes, it is ROHS3 Compliant per the compliance record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/49FCT3805AQG8","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/49FCT3805AQG8 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}}