{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940T-8.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940T-8.0","canonicalUrl":"https://icboms.com/texas-instruments/LM2940T-8.0","factsUrl":"https://icboms.com/api/mcp/products/LM2940T-8.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940T-8.0, positive fixed LDO regulator, 8V output, 1A, 66dB PSRR at 120Hz, dropout 1V max at 1A, TO-220-3 through-hole, -40°C to 125°C operating range.","salesMarkdown":"## 8 V fixed LDO for noise-sensitive industrial rails The Texas Instruments LM2940T-8.0 is a positive fixed-output low-dropout regulator delivering 8 V at up to 1 A from a maximum input of 26 V. ## Dropout headroom and thermal budget at 1 A Maximum dropout is 1 V at 1 A output, meaning the input rail must stay above 9 V to maintain regulation under full load. At 1 A with 1 V dropout the part dissipates 1 W minimum in the TO-220 — adequate with basic airflow or a small heatsink, but the thermal resistance junction-to-ambient (not listed here) should be checked against the enclosure's airflow for sustained operation. Quiescent current is 10 mA typical, rising to 15 mA max at the supply pin — a consideration for always-on battery-backed rails where every milliamp counts. ## Protection features and output configuration The single regulator includes over-current, over-temperature, reverse polarity, and short-circuit protection — a full set for a rugged point-of-load rail. Output is fixed at 8 V with positive configuration, so no external resistor divider is needed. The TO-220-3 package (three leads, tab is output) is a standard footprint for through-hole assembly and rework. ## NRND — plan the last-time-buy window A last-time-buy (LTB) notice may be issued at any time. For sustainment programs, securing a lifetime buy or qualifying a second source should begin now. ## Sourcing posture for the LM2940T-8.0 For buyers filling a BOM line on a sustainment program, the NRND status makes it prudent to request a quote with the required quantity and target delivery window so the supply position can be assessed before committing the line.","metaTitle":"LM2940T-8.0 LDO Regulator, 8V Fixed, 1A, TO-220, NRND","metaDescription":"Texas Instruments LM2940T-8.0 positive fixed LDO, 8V output, 1A, 66dB PSRR at 120Hz, TO-220-3, -40°C to 125°C. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"66dB (120Hz)","Series":"-","Package":"Tube","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Not For New Designs","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"1A","Base Product Number":"LM2940","Protection Features":"Over Current, Over Temperature, Reverse Polarity, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C~125°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"1V @ 1A","Current - Supply (Max)":"15 mA","Voltage - Output (Max)":"-","Supplier Device Package":"TO-220-3","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.7000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1c4256f4019947c4206f2126daf8930.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940T-8.0/alternatives.json"},"ai":{"faq":[{"question":"Is the LM2940T-8.0 obsolete or still available?","answer":"A last-time-buy notice may be issued, so buyers on sustainment programs should plan accordingly."},{"question":"What is the PSRR of the LM2940T-8.0?","answer":"PSRR is 66 dB at 120 Hz, which provides good ripple rejection from a rectified mains supply for sensitive analog loads."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940T-8.0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2940T-8.0 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}}