{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LMK1D2104RHDR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LMK1D2104RHDR","canonicalUrl":"https://icboms.com/texas-instruments/LMK1D2104RHDR","factsUrl":"https://icboms.com/api/mcp/products/LMK1D2104RHDR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LMK1D2104RHDR, Clock Buffer, 1:4 fanout, 2 GHz max, LVDS output, 28-VQFN (5x5), -40°C to 105°C, triple supply range (1.8V/2.5V/3.3V).","salesMarkdown":"## 2 GHz fanout buffer with multi-protocol input flexibility Each of the two independent fanout circuits distributes one input to four matched outputs, making it a compact building block for high-speed clock trees in networking, telecom, and data-center equipment where signal integrity and low additive jitter matter. That makes it a straightforward choice for production BOMs where long-term availability is a requirement. For dual-sourcing or a pin-compatible alternative, the CDCLVP1204RGTR is a functional peer but uses LVPECL outputs and a single 1:2 fanout topology — the output logic family and fanout ratio differ, so a straight swap requires board-level changes. ## Package and footprint notes for layout The wettable-flank terminals aid optical inspection and solder-joint reliability. Supply decoupling should follow the recommended layout in the datasheet — one 0.1 µF cap per supply pin pair, placed as close as possible to the VQFN edge.","metaTitle":"TI LMK1D2104RHDR Clock Buffer, 1:4 Fanout, 2 GHz, 28-VQFN","metaDescription":"Texas Instruments LMK1D2104RHDR clock buffer IC, 1:4 fanout per channel, 2 GHz max frequency, LVDS output, -40°C to 105°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"Mfr":"Texas Instruments","Type":"Clock Buffer","Input":"CML, HCSL, LVCMOS, LVDS, LVPECL","Output":"LVDS","Series":"-","Package":"Tape & Reel (TR) Cut Tape (CT)","Mounting Type":"Surface Mount, Wettable Flank","Package / Case":"28-VFQFN Exposed Pad","Product Status":"Active","Frequency - Max":"2 GHz","lifecycle_stage":"eol_hot","Voltage - Supply":"1.71V ~ 1.89V, 2.375V ~ 2.625V, 3.135V ~ 3.465V","Number of Circuits":"2","Ratio - Input:Output":"1:4","Operating Temperature":"-40°C ~ 105°C (TA)","Supplier Device Package":"28-VQFN (5x5)","Differential - Input:Output":"Yes/Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.2900","priceTiers":[{"qty":1,"price":"$10.29000","currency":"USD"},{"qty":10,"price":"$9.29200","currency":"USD"},{"qty":25,"price":"$8.85960","currency":"USD"},{"qty":100,"price":"$7.69280","currency":"USD"},{"qty":250,"price":"$7.34704","currency":"USD"},{"qty":500,"price":"$6.69878","currency":"USD"},{"qty":1000,"price":"$5.83442","currency":"USD"},{"qty":3000,"price":"$5.61833","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9c725cb81f170e1ae7ee98730333fcda.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LMK1D2104RHDR/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum frequency of LMK1D2104RHDR?","answer":"The LMK1D2104RHDR supports a maximum input/output frequency of 2 GHz, making it suitable for buffering high-speed serial links such as PCIe, 10GbE, and Fibre Channel reference clocks."},{"question":"Is LMK1D2104RHDR a replacement for LMK1D2108?","answer":"The LMK1D2104RHDR is a different device from the LMK1D2108. The LMK1D2104RHDR provides two independent 1:4 fanout buffers, while the LMK1D2108 is a single 1:8 fanout buffer. They are not pin-compatible replacements; verify the fanout ratio and pinout before substituting."},{"question":"What input signal types does LMK1D2104RHDR accept?","answer":"The LMK1D2104RHDR accepts CML, HCSL, LVCMOS, LVDS, and LVPECL input signals, giving designers flexibility to interface with a wide range of clock sources without external level translation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LMK1D2104RHDR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LMK1D2104RHDR 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}}