{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3840PL43DBVR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3840PL43DBVR","canonicalUrl":"https://icboms.com/texas-instruments/TPS3840PL43DBVR","factsUrl":"https://icboms.com/api/mcp/products/TPS3840PL43DBVR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3840PL43DBVR, Power Supply Monitor, 4.3V threshold, Active Low reset, Push-Pull output, SC-74A SOT-753 surface-mount package","salesMarkdown":"## What this supervisor monitors and why the threshold matters The TPS3840PL43DBVR is a single-channel power supply monitor from Texas Instruments that asserts a reset signal when the monitored voltage drops below 4.3V. That 4.3V threshold is a standard choice for 5V rails — it catches a brownout before the downstream logic loses its state, but stays high enough to avoid nuisance resets during normal ripple. The reset output is active low and push-pull, meaning it drives the reset line directly without an external pull-up resistor. That saves one resistor per rail on the BOM and keeps the trace count low in tight layouts. ## Timeout, temperature range, and package fit The reset timeout is 619ms typical — long enough to let the supply stabilise after a glitch, short enough that the system boots without a noticeable delay. The part comes in an SC-74A / SOT-753 package, also listed as SOT-23-5 supplier device package. The 5-pin footprint is compact and widely used — the 0.95 mm pitch and 2.9 mm body length fit on a two-layer board without fan-out issues. There is no announced PCN or EOL, so it can be designed into a long-run BOM without an immediate second-source contingency. The base product number is TPS3840, and the suffix encodes the threshold voltage and output type — the PL43 indicates the 4.3V threshold and push-pull output. ROHS3 compliant, surface-mount on tape and reel or cut tape.","metaTitle":"TPS3840PL43DBVR Texas Instruments Power Supply Monitor","metaDescription":"Texas Instruments TPS3840PL43DBVR power supply monitor, 4.3V threshold, push-pull output, 619ms timeout, SOT-23-5. Active production.","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":"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":"4.3V","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/TPS3840PL43DBVR/alternatives.json"},"ai":{"faq":[{"question":"Does TPS3840PL43DBVR have a push-pull output?","answer":"Yes, the output is push-pull, totem pole. Active low reset — no external pull-up resistor needed."},{"question":"What is the difference between TPS3840PL43DBVR and TPS3840DL43DBVR?","answer":"Both share the same 4.3V threshold and base family. The suffix difference — PL vs DL — indicates the output type: PL is push-pull, DL is open-drain. Open-drain requires an external pull-up resistor; push-pull does not. Pin-compatible in the same SOT-23-5 footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3840PL43DBVR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3840PL43DBVR 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}}