{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3840PH40DBVR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3840PH40DBVR","canonicalUrl":"https://icboms.com/texas-instruments/TPS3840PH40DBVR","factsUrl":"https://icboms.com/api/mcp/products/TPS3840PH40DBVR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3840PH40DBVR, Simple Reset/Power-On Reset, Active High, Push-Pull Output, 4V Threshold, 619ms Typical Reset Timeout, SC-74A/SOT-753, -40°C to 125°C","salesMarkdown":"## What the active-high reset means for your processor interface The TPS3840PH40DBVR asserts a logic-high reset output when the monitored supply drops below the 4V threshold. The active-high polarity is less common than active-low — confirm your MCU or SoC expects a high-going reset pulse, or plan an external inverter. The push-pull output drives the reset line rail-to-rail without a pull-up resistor, saving a BOM component. Reset timeout is 619 ms typical, long enough to let the primary supply and oscillator settle before the processor starts executing. In a battery-charger or motor-drive controller, that delay prevents code fetch before the rail is stable. ## Temperature range and package for harsh environments The SOT-23-5 package occupies minimal board area — the 0.95 mm pitch is hand-solderable but benefits from a solder stencil for consistent fillets. Compared to the TLV803EA29VDBZR, which uses an active-low open-drain output and requires an external pull-up, the TPS3840PH40DBVR's active-high push-pull stage eliminates that resistor and the associated failure point. The TLV803 series has a shorter minimum reset timeout (130 ms vs 619 ms typical); choose the TPS3840 when a longer power-up delay is needed. The base product number TPS3840 covers a family of threshold and timeout options, so a voltage or timing change in a future spin stays within the same footprint. ROHS3 compliant — no exemption concerns for EU or global markets.","metaTitle":"TPS3840PH40DBVR – TI Simple Reset/Power-On Reset","metaDescription":"TPS3840PH40DBVR: Texas Instruments Simple Reset/Power-On Reset IC, active-high push-pull output, 4V threshold, 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":"Simple Reset/Power-On Reset","Reset":"Active High","Output":"Push-Pull, Totem Pole","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":"4V","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/TPS3840PH40DBVR/alternatives.json"},"ai":{"faq":[{"question":"Is TPS3840PH40DBVR active high or active low reset?","answer":"Active high. The reset output goes high when the monitored voltage falls below the 4V threshold and stays high for the 619 ms timeout after the supply recovers. Verify your processor's reset input polarity; if it expects active low, add an inverter or choose a different threshold variant in the TPS3840 family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3840PH40DBVR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3840PH40DBVR 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}}