{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LMK00308SQE/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LMK00308SQE-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LMK00308SQE-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LMK00308SQE%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LMK00308SQE/NOPB, Fanout Buffer (Distribution), Multiplexer, Translator, 3:9 ratio, 3.1 GHz max frequency, 40-WFQFN Exposed Pad package, industrial temperature range.","salesMarkdown":"## What this clock buffer does for your clock tree The LMK00308SQE/NOPB is a 3:9 fanout buffer, multiplexer, and level translator from Texas Instruments, built for distributing high-speed reference clocks in systems that mix CML, HCSL, HSTL, LVDS, LVPECL, SSTL, or crystal inputs. It handles a maximum frequency of 3.1 GHz, which covers PCIe Gen4/5 reference clocks, 10G Ethernet, and JESD204B SYSREF distribution without needing a separate translation stage. The 3:1 input mux lets a single device select among three clock sources — useful for redundant oscillator inputs or switching between a local crystal and a backplane-derived clock. The nine outputs can be individually configured as HCSL, LVCMOS, LVDS, or LVPECL, so one part feeds SerDes, FPGA banks, and logic with different logic families. ## Supply rail tolerance and temperature grade The supply voltage range is 3.15 V to 3.45 V — a tight 3.3 V nominal with only ±150 mV margin. The board's 3.3 V regulator must hold within this window under load; a 3.3 V rail that droops to 3.0 V at full fanout will violate the minimum. It is ROHS3 compliant.","metaTitle":"LMK00308SQE/NOPB Clock Buffer 3:9 3.1 GHz 40-WQFN - TI","metaDescription":"Texas Instruments LMK00308SQE/NOPB fanout buffer, multiplexer, translator. 3:9 ratio, 3.1 GHz max, industrial temp -40°C to 85°C. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"Mfr":"Texas Instruments","Type":"Fanout Buffer (Distribution), Multiplexer, Translator","Input":"CML, HCSL, HSTL, LVDS, LVPECL, SSTL, Crystal","Output":"HCSL, LVCMOS, LVDS, LVPECL","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Package / Case":"40-WFQFN Exposed Pad","Product Status":"Active","Frequency - Max":"3.1 GHz","lifecycle_stage":"eol_hot","Voltage - Supply":"3.15V ~ 3.45V","Number of Circuits":"1","Base Product Number":"LMK00308","Ratio - Input:Output":"3:9","Operating Temperature":"-40°C~85°C","Supplier Device Package":"40-WQFN (6x6)","Differential - Input:Output":"Yes/Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.9700","priceTiers":[{"qty":1,"price":"$11.97000","currency":"USD"},{"qty":10,"price":"$10.81200","currency":"USD"},{"qty":25,"price":"$10.30880","currency":"USD"},{"qty":100,"price":"$8.95100","currency":"USD"},{"qty":250,"price":"$8.54868","currency":"USD"},{"qty":500,"price":"$7.79440","currency":"USD"},{"qty":1250,"price":"$7.11600","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7cdf3cb5cb800f36f9eb913345a70a4b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LMK00308SQE%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Is LMK00308SQE/NOPB the same as LMK00308SQ?","answer":"The base product number is LMK00308. The /NOPB suffix indicates lead-free (ROHS3 compliant) finish. The LMK00308SQ variant without /NOPB may have a different finish — confirm the BOM's ROHS requirement before substituting."},{"question":"Is LMK00308SQE/NOPB a PLL?","answer":"No. It is a fanout buffer, multiplexer, and translator. It does not contain a phase-locked loop or frequency synthesis — it distributes and level-shifts an incoming clock without changing the frequency."},{"question":"What input types does LMK00308SQE/NOPB accept?","answer":"This one device covers the common high-speed logic families used in telecom and data-communications clock distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LMK00308SQE-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LMK00308SQE-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}