{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3840DL46DBVR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3840DL46DBVR","canonicalUrl":"https://icboms.com/texas-instruments/TPS3840DL46DBVR","factsUrl":"https://icboms.com/api/mcp/products/TPS3840DL46DBVR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3840DL46DBVR, Simple Reset/Power-On Reset IC, single-channel supervisor, active-low open-drain output, 4.6V threshold, 619 ms reset timeout, SOT-23-5 package, -40°C to 125°C junction temperature.","salesMarkdown":"## Supervisor for 5V rails — 4.6V threshold and 619 ms timeout The TPS3840DL46DBVR is a single-channel voltage supervisor from Texas Instruments, designed to hold a microcontroller or FPGA in reset until the supply rail stabilises. Its 4.6V threshold is a natural fit for monitoring a nominal 5V rail, asserting reset when the voltage dips below that level. The reset output is active-low, open-drain, so it can be wire-ORed with other reset sources or pulled up to any logic voltage up to the absolute maximum rating — no level-shifting needed when interfacing to 3.3V or 1.8V logic. A built-in 619 ms (typical) reset timeout keeps the system in reset long enough for the supply to ring up cleanly after a brownout, without requiring an external capacitor. ## Temperature range and package for industrial builds The 5-pin footprint breaks out to the supply rail, ground, reset output, and a manual-reset input on the base part — though this variant is a dedicated supervisor without MR. ## Sourcing posture — active, single-source, no direct replacement There is no official pin-compatible second source from another manufacturer. Within the TPS3840 family, other threshold voltages (e.g. 3.0V, 3.3V, 5.0V) share the same SOT-23-5 footprint but differ in trip point — confirm the rail voltage before substituting.","metaTitle":"TPS3840DL46DBVR TI Simple Reset IC, 4.6V Threshold, SOT-23-5","metaDescription":"Texas Instruments TPS3840DL46DBVR: Simple reset/power-on reset, active-low open-drain output, 4.6V threshold, 619 ms 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 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":"4.6V","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/TPS3840DL46DBVR/alternatives.json"},"ai":{"faq":[{"question":"Is TPS3840DL46DBVR compatible with 3.3V logic?","answer":"Yes. The open-drain output allows the pull-up resistor to be tied to any voltage within the absolute maximum rating of the output transistor — typically up to 6V. For a 3.3V microcontroller, pull the reset output to 3.3V through a 10 kΩ resistor; the open-drain structure will pull the line low without level translation."},{"question":"What is the reset timeout of TPS3840DL46DBVR?","answer":"The reset timeout is 619 ms typical. This is a fixed internal delay — no external capacitor is needed. It ensures the supply has settled after a brownout before the processor is released from reset."},{"question":"Does TPS3840DL46DBVR have an open-drain output?","answer":"Yes. The reset output is open-drain, active-low. It requires an external pull-up resistor to the logic supply rail. This output type allows wire-ORing with other reset sources and works with any pull-up voltage up to the device's absolute maximum rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3840DL46DBVR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3840DL46DBVR 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}}