{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM4040DIM3X-2.5","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM4040DIM3X-2.5","canonicalUrl":"https://icboms.com/texas-instruments/LM4040DIM3X-2.5","factsUrl":"https://icboms.com/api/mcp/products/LM4040DIM3X-2.5","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM4040DIM3X-2.5 precision micropower shunt voltage reference, fixed 2.5 V output, ±1% tolerance, SOT-23-3 surface mount package, -40°C to 85°C operation.","salesMarkdown":"## 2.5 V shunt reference — precision and noise floor The Texas Instruments LM4040DIM3X-2.5 is a micropower shunt voltage reference delivering a fixed 2.5 V output with ±1% initial tolerance. ## Cathode current, output drive, and temperature drift Minimum cathode current is 70 µA — the shunt must see at least this much current through the bias resistor to maintain regulation. Maximum output current is 15 mA, which sets the upper bound on the load the reference can drive directly. Temperature coefficient is 150 ppm/°C. This means the part is at end-of-life — final production orders are being accepted, but no further manufacturing runs are planned after the LTB window closes. For a BOM line still specifying this exact order code, the immediate action is to secure lifetime buy quantities for forecasted production needs, or qualify a pin-compatible alternative.","metaTitle":"LM4040DIM3X-2.5 Shunt Voltage Reference, 2.5V ±1%, SOT-23-3","metaDescription":"LM4040DIM3X-2.5 precision micropower shunt voltage reference from TI. Fixed 2.5V output, ±1% tolerance, 70 µA cathode current, 35 µVrms noise. SOT-23-3 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Last Buy","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR) Cut Tape (CT)","Tolerance":"±1%","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Last Time Buy","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"15 mA","Current - Supply":"-","Current - Cathode":"70 µA","Base Product Number":"LM4040","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"35µVrms","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"150ppm/°C","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/93e806034867a3db3fae2a3c2b61e556.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM4040DIM3X-2.5/alternatives.json"},"ai":{"faq":[{"question":"Is LM4040DIM3X-2.5 obsolete?","answer":"The manufacturer lists the LM4040DIM3X-2.5 as Last Buy, meaning the part is in its final production phase and approaching obsolescence. It is not yet fully discontinued, but the LTB window is active — plan for a replacement or secure lifetime buy quantities soon."},{"question":"What is the difference between LM4040DIM3-2.5 and LM4040DIM3X-2.5?","answer":"The LM4040DIM3-2.5 and LM4040DIM3X-2.5 share the same electrical specifications — both are 2.5 V shunt references with ±1% tolerance in SOT-23-3 packages. The difference is in the tape-and-reel packaging suffix: the 'X' variant denotes a specific reel orientation or quantity. They are functionally identical and can be substituted in the same PCB footprint, but verify the reel packaging matches your assembly house requirements."},{"question":"Can I use LM4040AIM3-2.5 instead of LM4040DIM3X-2.5?","answer":"Yes — the LM4040AIM3-2.5 is pin-compatible and shares the same 2.5 V output and SOT-23-3 package. The key difference is tighter tolerance: the AIM3 grade offers ±0.1% versus the DIM3X's ±1%. Electrically it is a drop-in replacement that improves reference accuracy, though the tighter tolerance typically carries a higher unit cost."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM4040DIM3X-2.5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM4040DIM3X-2.5 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}