{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940T-9.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940T-9.0","canonicalUrl":"https://icboms.com/texas-instruments/LM2940T-9.0","factsUrl":"https://icboms.com/api/mcp/products/LM2940T-9.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940T-9.0, fixed 9V positive LDO voltage regulator, 1A output, TO-220-3 through-hole package, -40°C to 125°C operating temperature, PSRR 64dB at 120Hz.","salesMarkdown":"The LM2940T-9.0 carries a Not Recommended for New Designs (NRND) status. If you are refreshing a legacy board or filling a BOM line for a current product, the part is still orderable — but any new design should target a pin-compatible replacement before the end-of-life notice drops. ## 1A fixed 9V rail — what the dropout means at load This is a single-output positive LDO delivering a fixed 9V at up to 1A. The maximum dropout voltage is 1V at full load, so the input rail needs to stay above 10V to maintain regulation. With a 26V absolute maximum input, it handles unregulated supplies from 12V or 24V buses comfortably. ## PSRR and protection — analog supply suitability PSRR is 64dB at 120Hz, which is typical for a 1A LDO of this generation. That is enough rejection for most 9V analog rails feeding op-amps or small signal chains, but if you need better ripple rejection above 1 kHz, a higher-PSRR LDO or a post-filter stage is worth considering. The built-in protection suite — over-current, over-temperature, reverse polarity, and short-circuit — covers the common fault modes in industrial and automotive environments. ## Temperature range and package — industrial and automotive ready The TO-220-3 through-hole package with a metal tab lets you bolt it to a heatsink or chassis — the tab is the output pin, so the heatsink path is electrically live.","metaTitle":"LM2940T-9.0 1A Fixed 9V LDO Regulator, TO-220-3, NRND","metaDescription":"LM2940T-9.0 1A fixed 9V output LDO regulator in TO-220-3. PSRR 64dB at 120Hz, -40°C to 125°C range.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"64dB (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)":"9V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.8296","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1c4256f4019947c4206f2126daf8930.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940T-9.0/alternatives.json"},"ai":{"faq":[{"question":"Is LM2940T-9.0 obsolete or NRND?","answer":"The LM2940T-9.0 is listed as Not Recommended for New Designs (NRND). It is not yet discontinued, but TI will not qualify it for new projects. Existing production can continue ordering it; new designs should evaluate a pin-compatible replacement before the eventual EOL."},{"question":"What is LM2940T-9.0's PSRR specification?","answer":"PSRR is 64dB at 120Hz. This is adequate for 9V analog rails feeding op-amps or signal-chain circuits, but for higher-frequency ripple rejection above 1 kHz, consider a post-filter or a higher-PSRR LDO."},{"question":"What are LM2940T-9.0 alternatives or replacements?","answer":"Within the same LM2940 family, pin-compatible fixed-voltage variants exist at other output voltages. For a direct 9V 1A replacement with an active lifecycle status, cross-reference the LM2940T-9.0 against the LM2940IMP-9.0 or equivalent series from other manufacturers — verify pinout and dropout characteristics before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940T-9.0","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-9.0 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}}