{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3840DL27DBVR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3840DL27DBVR","canonicalUrl":"https://icboms.com/texas-instruments/TPS3840DL27DBVR","factsUrl":"https://icboms.com/api/mcp/products/TPS3840DL27DBVR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3840DL27DBVR power supply monitor, 2.7 V threshold, active-low open-drain output, 619 ms typical reset timeout, -40°C to 125°C junction temperature, SOT-23-5 package.","salesMarkdown":"The TPS3840DL27DBVR is a single-channel power supply monitor from Texas Instruments that asserts a reset when the monitored voltage drops below 2.7 V. The output is active-low open-drain. ## 619 ms timeout — long enough for the rail to settle The reset timeout is 619 ms typical. That window gives the bulk decoupling capacitors on the rail time to charge to the regulated voltage before the processor is released from reset. If the downstream device needs a shorter or longer delay, this part is fixed — no external capacitor to trim it — so the 619 ms figure is a design-in parameter, not a tuning option. ## Temperature range and package — industrial and automotive capable","metaTitle":"TI TPS3840DL27DBVR Power Supply Monitor, 2.7 V Threshold","metaDescription":"Texas Instruments TPS3840DL27DBVR power supply monitor with 2.7 V threshold, active-low open-drain output, 619 ms reset timeout. -40°C to 125°C range. SOT-23-5.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Type":"Power Supply Monitor","Reset":"Active Low","Output":"Open Drain or Open Collector","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Reset Timeout":"619ms Typical","Package / Case":"SC-74A, SOT-753","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"TPS3840","Voltage - Threshold":"2.7V","Operating Temperature":"-40°C~125°C(TJ)","Supplier Device Package":"SOT-23-5","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/5c43cdc78d6ce4876119969a2f71b26e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS3840DL27DBVR/alternatives.json"},"ai":{"faq":[{"question":"What is the exact reset threshold voltage of TPS3840DL27DBVR?","answer":"The reset threshold voltage is 2.7 V. The monitor asserts reset when the supply drops below that level and releases it after the 619 ms timeout once the voltage rises above the threshold."},{"question":"What is the typical reset timeout for TPS3840DL27DBVR?","answer":"The typical reset timeout is 619 ms. This is a fixed delay — no external capacitor is needed to set it."},{"question":"Is TPS3840DL27DBVR active low or active high?","answer":"The reset output is active low. The open-drain output pulls low when the supply is below the threshold and goes high-impedance (released) after the timeout when the supply recovers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3840DL27DBVR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3840DL27DBVR 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}}