{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3840DL18DBVR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3840DL18DBVR","canonicalUrl":"https://icboms.com/texas-instruments/TPS3840DL18DBVR","factsUrl":"https://icboms.com/api/mcp/products/TPS3840DL18DBVR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3840DL18DBVR, Power Supply Monitor, 1.8V threshold, active-low open-drain output, 619ms typical reset timeout, SOT-23-5, -40°C to 125°C.","salesMarkdown":"## 1.8V rail watchdog with 619ms hold-up The TPS3840DL18DBVR is a single-channel power supply monitor from Texas Instruments, designed to assert a reset signal when the monitored 1.8V rail drops below the threshold. The active-low, open-drain output stays low for a typical 619ms after the rail returns — long enough for downstream regulators and MCUs to finish their power-up sequence before the system starts executing code. ## Industrial temp range and package fit The SOT-23-5 package (SC-74A footprint) is a standard 5-pin surface-mount layout — the same footprint used by many other voltage supervisors, making it a straightforward drop-in for existing BOM positions. For new designs or production replenishment, the part is sourced per RFQ — no minimum buy or LTB math needed.","metaTitle":"TPS3840DL18DBVR Power Supply Monitor - TI, Active Low","metaDescription":"Texas Instruments TPS3840DL18DBVR Power Supply Monitor, 1.8V threshold, active-low open-drain output, 619ms timeout, -40°C to 125°C, SOT-23-5.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","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":"1.8V","Operating Temperature":"-40°C~125°C(TJ)","Supplier Device Package":"SOT-23-5","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0100","priceTiers":[{"qty":1,"price":"$1.01000","currency":"USD"},{"qty":10,"price":"$0.90400","currency":"USD"},{"qty":25,"price":"$0.85760","currency":"USD"},{"qty":100,"price":"$0.70460","currency":"USD"},{"qty":250,"price":"$0.65864","currency":"USD"},{"qty":500,"price":"$0.58204","currency":"USD"},{"qty":1000,"price":"$0.45951","currency":"USD"},{"qty":3000,"price":"$0.39000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5c43cdc78d6ce4876119969a2f71b26e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS3840DL18DBVR/alternatives.json"},"ai":{"faq":[{"question":"What is the reset timeout of TPS3840DL18DBVR?","answer":"The typical reset timeout period is 619ms, which gives the system time to stabilize after the monitored rail returns to regulation."},{"question":"Is the TPS3840DL18DBVR reset output active low or active high?","answer":"The reset output is active low with an open-drain configuration, so it pulls the reset line low when the monitored voltage falls below the 1.8V threshold."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3840DL18DBVR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3840DL18DBVR 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}}