{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3840PL45DBVR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3840PL45DBVR","canonicalUrl":"https://icboms.com/texas-instruments/TPS3840PL45DBVR","factsUrl":"https://icboms.com/api/mcp/products/TPS3840PL45DBVR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3840PL45DBVR, Power Supply Monitor, 1-channel, Active-Low Push-Pull Reset, 4.5V Threshold, 619ms Typical Reset Timeout, SOT-23-5, -40°C to 125°C","salesMarkdown":"## 4.5V supply monitor with a 619ms hold-off The TPS3840PL45DBVR is a single-channel power supply monitor from Texas Instruments that asserts an active-low reset when the monitored rail drops below 4.5V. The reset output stays low for 619ms typical after the supply recovers — long enough for most MCUs and SoCs to complete their power-on reset sequence before the core starts executing code. The push-pull output drives the reset line directly without an external pull-up resistor, saving a BOM component on boards where the MCU reset pin is not internally pulled high. ## Wide temperature range and package fit Housed in a 5-pin SOT-23 (SC-74A) package, it shares the same 0.95 mm pitch footprint as many other TI supervisors — the TLV803 family, for example — so a layout designed for one can often accept the other with a BOM swap. ## Active production — no end-of-life shadow The base product number TPS3840 covers multiple voltage thresholds in the same package — if a future design moves to a 3.3V or 5.0V rail, the PCB layout stays unchanged.","metaTitle":"TPS3840PL45DBVR – TI Power Supply Monitor, 4.5V Threshold","metaDescription":"Texas Instruments TPS3840PL45DBVR power supply monitor with 4.5V threshold, active-low push-pull reset, 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":"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":"4.5V","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/TPS3840PL45DBVR/alternatives.json"},"ai":{"faq":[{"question":"What is the reset threshold of the TPS3840PL45DBVR?","answer":"The voltage threshold is 4.5V. The device asserts reset when the monitored supply falls below this level and releases it after a 619ms typical timeout once the supply recovers."},{"question":"Is the TPS3840PL45DBVR active low or active high?","answer":"Active-low reset. The output goes low when the supply drops below threshold and returns high after the timeout period. The push-pull stage drives the reset line directly."},{"question":"What is the closest functional equivalent to the TPS3840PL45DBVR?","answer":"The TLV803EA29VDBZR is a similar single-channel supervisor from TI but with a 2.93V threshold and an open-drain output (requires an external pull-up). The TPS3840PL45DBVR uses a push-pull output and monitors a 4.5V rail — the two are not pin-compatible substitutes unless the threshold and output type match the application."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3840PL45DBVR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3840PL45DBVR 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}}