{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LMK1D1204PRHDR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LMK1D1204PRHDR","canonicalUrl":"https://icboms.com/texas-instruments/LMK1D1204PRHDR","factsUrl":"https://icboms.com/api/mcp/products/LMK1D1204PRHDR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LMK1D1204PRHDR clock buffer, 2:4 differential fanout, 2 GHz max frequency, 1.71V–3.465V supply range, -40°C to 105°C, 28-VQFN (5x5) package, active production.","salesMarkdown":"The Texas Instruments LMK1D1204PRHDR is a 2:4 differential clock buffer designed to fan out a single high-speed clock input to four outputs with minimal additive jitter. It accepts a differential clock input and delivers four differential clock outputs, all rated to 2 GHz, making it suitable for distributing reference clocks in networking, telecom, and data-converter systems where phase noise and skew matter. The buffer operates across three supply voltage ranges — 1.71 V to 1.89 V, 2.375 V to 2.625 V, and 3.135 V to 3.465 V — so it can sit on a 1.8 V, 2.5 V, or 3.3 V rail without a level translator. ## 2 GHz differential path — what the frequency rating means for the signal chain A 2 GHz max frequency means this buffer can handle 10 GbE reference clocks, JESD204B SYSREF signals up to the full rate, and high-speed ADC/DAC sampling clocks without rolling off the edge rate. The differential input and output (Yes/Yes per the spec) reject common-mode noise coupled onto the clock trace, which is critical when the clock distribution runs across a noisy digital board. Because the part is a buffer, not a PLL, it does not clean up jitter — it preserves the input phase noise floor. The buyer should pair it with a clean oscillator source and keep the supply decoupling tight, especially on the 1.8 V rail where PSRR tends to be lower. ## Package, footprint, and thermal considerations for the 28-VQFN The LMK1D1204PRHDR comes in a 28-pin VQFN with an exposed thermal pad (5 mm × 5 mm body). At 2 GHz fanning out four differential pairs, the junction temperature stays well within limits if the pad is properly stitched. The surface-mount package is MSL-rated (ROHS3 compliant per the listing), so standard reflow profiles work; the exposed pad also helps with ground return inductance for the high-speed outputs. There is no NRND notice, no last-time-buy window, and no announced end-of-life. That makes it a safe selection for production BOMs that need to stay in the field for five to ten years.","metaTitle":"LMK1D1204PRHDR Clock Buffer, 2:4 Fanout, 2 GHz, 28-VQFN","metaDescription":"TI LMK1D1204PRHDR clock buffer with 2:4 differential fanout, 2 GHz max frequency. Supports 1.8V/2.5V/3.3V supplies, -40 to 105°C. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"Mfr":"Texas Instruments","Type":"Clock Buffer","Input":"Clock","Output":"Clock","Series":"-","Package":"Tape & Reel (TR) Cut Tape (CT)","Mounting Type":"Surface Mount","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":"1","Ratio - Input:Output":"2:4","Operating Temperature":"-40°C ~ 105°C (TA)","Supplier Device Package":"28-VQFN (5x5)","Differential - Input:Output":"Yes/Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.8900","priceTiers":[{"qty":1,"price":"$9.89000","currency":"USD"},{"qty":10,"price":"$8.93600","currency":"USD"},{"qty":25,"price":"$8.52000","currency":"USD"},{"qty":100,"price":"$7.39790","currency":"USD"},{"qty":250,"price":"$7.06544","currency":"USD"},{"qty":500,"price":"$6.44204","currency":"USD"},{"qty":1000,"price":"$5.61080","currency":"USD"},{"qty":3000,"price":"$5.40299","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9774b1ca9822cf53b9064fb52c35d1c3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LMK1D1204PRHDR/alternatives.json"},"ai":{"faq":[{"question":"What are the equivalents for the LMK1D1204PRHDR?","answer":"A close functional peer is the CDCLVP1204RGTR from TI, also a 2:4 differential buffer at 2 GHz. The key difference: the CDCLVP1204 outputs are LVPECL, while the LMK1D1204PRHDR accepts and outputs differential signals (LVDS, LVPECL, HCSL compatible per typical use). The CDCLVP1204 is rated -40°C to 85°C, narrower than the LMK1D1204's 105°C. Pin compatibility should be verified against the respective datasheets."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LMK1D1204PRHDR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LMK1D1204PRHDR 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}}