{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3839A09DBZT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3839A09DBZT","canonicalUrl":"https://icboms.com/texas-instruments/TPS3839A09DBZT","factsUrl":"https://icboms.com/api/mcp/products/TPS3839A09DBZT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3839A09DBZT, Simple Reset/Power-On Reset, 1-channel supervisor, 0.9V threshold, 120ms minimum reset timeout, push-pull active-low output, SOT-23-3 package, -40°C to 85°C operating temperature.","salesMarkdown":"## 0.9V threshold — why it matters for low-voltage rails The TPS3839A09DBZT monitors a single supply rail and asserts a reset when the voltage drops to 0.9V. That threshold is designed for 1.8V or 1.2V core supplies — the supervisor catches a brownout before the logic rails collapse into undefined states. The reset output is active-low push-pull, so it drives the reset pin of an MCU or FPGA directly without needing an external pull-up resistor. The 120ms minimum timeout holds the reset long enough for the supply to settle after power-up or a glitch. ## Package and temperature range for the board Housed in a 3-pin SOT-23-3, the footprint is compact — about 2.9 mm × 1.3 mm — and routes easily on two-layer boards. The part is ROHS3 compliant. The part can be ordered in tape-and-reel or cut-tape quantities.","metaTitle":"TPS3839A09DBZT – 0.9V Threshold Supervisor, SOT-23-3, Active","metaDescription":"Texas Instruments TPS3839A09DBZT: Simple Reset/Power-On Reset, 0.9V threshold, 120ms timeout, push-pull output, SOT-23-3, -40°C to 85°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 Low","Output":"Push-Pull, Totem Pole","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Reset Timeout":"120ms Minimum","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"TPS3839","Voltage - Threshold":"0.9V","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"SOT-23-3","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9400","priceTiers":[{"qty":1,"price":"$0.94000","currency":"USD"},{"qty":10,"price":"$0.84100","currency":"USD"},{"qty":25,"price":"$0.79840","currency":"USD"},{"qty":100,"price":"$0.65580","currency":"USD"},{"qty":250,"price":"$0.61304","currency":"USD"},{"qty":500,"price":"$0.54176","currency":"USD"},{"qty":1250,"price":"$0.42771","currency":"USD"},{"qty":2500,"price":"$0.40350","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8db2a3e3b3bb51ea8ca211210c7cfea5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS3839A09DBZT/alternatives.json"},"ai":{"faq":[{"question":"What is the exact reset threshold voltage for TPS3839A09DBZT?","answer":"The reset threshold is 0.9V. That means the supervisor asserts a reset when the monitored supply falls to 0.9V, which is appropriate for 1.8V or 1.2V core rails."},{"question":"Is TPS3839A09DBZT a direct replacement for TPS3839A09DBZR?","answer":"Yes — the two differ only in packaging option: DBZT is cut tape, DBZR is tape-and-reel. The silicon, threshold, timeout, and pinout are identical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3839A09DBZT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3839A09DBZT 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}}