{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3840PH18DBVR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3840PH18DBVR","canonicalUrl":"https://icboms.com/texas-instruments/TPS3840PH18DBVR","factsUrl":"https://icboms.com/api/mcp/products/TPS3840PH18DBVR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3840PH18DBVR, Simple Reset/Power-On Reset, 1.8V threshold, Active High push-pull output, 619 ms typical reset timeout, -40°C to 125°C junction, SOT-23-5 package.","salesMarkdown":"## 1.8V rail supervisor with active-high assertion The TPS3840PH18DBVR is a single-channel voltage supervisor from TI's TPS3840 family, built to monitor a 1.8V supply rail and assert a logic-high reset when the voltage drops below that threshold. The active-high output is push-pull, so it drives the reset line directly without an external pull-up resistor. This delay is fixed internally; no external capacitor is needed. The 619 ms typical reset timeout is a single, non-adjustable value. For designs that need a shorter or programmable delay, the TLV803 family offers 130 ms and 33 ms minimum options, but those parts use an open-drain active-low output and require an external pull-up. This means the die can reach 125°C even if the ambient stays lower — relevant for enclosures with poor airflow or adjacent hot components. We can quote against your BOM quantity and confirm availability at the time of the RFQ.","metaTitle":"TPS3840PH18DBVR – TI Simple Reset IC, 1.8V Threshold","metaDescription":"Texas Instruments TPS3840PH18DBVR simple reset/power-on reset IC. 1.8V threshold, active-high push-pull output, 619 ms timeout, -40°C to 125°C.","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":"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":"$1.2100","priceTiers":[{"qty":1,"price":"$1.21000","currency":"USD"},{"qty":10,"price":"$1.08500","currency":"USD"},{"qty":25,"price":"$1.03000","currency":"USD"},{"qty":100,"price":"$0.84600","currency":"USD"},{"qty":250,"price":"$0.79080","currency":"USD"},{"qty":500,"price":"$0.69886","currency":"USD"},{"qty":1000,"price":"$0.55173","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/TPS3840PH18DBVR/alternatives.json"},"ai":{"faq":[{"question":"Does TPS3840PH18DBVR have an active-high reset?","answer":"Yes, the reset output is active high with a push-pull, totem-pole stage. The output goes high when the monitored 1.8V rail drops below the threshold and stays high for the 619 ms timeout after the rail recovers."},{"question":"When sourcing TPS3840PH18DBVR, what is the closest functional alternative?","answer":"The TLV803EA29VDBZR is a simple reset supervisor from the same class, but it has an active-low open-drain output and a 130 ms minimum timeout, compared to the TPS3840's active-high push-pull output with 619 ms typical timeout. The output polarity and drive type differ, so a board-level change is required to swap them."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3840PH18DBVR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3840PH18DBVR 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}}