{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3839A09DQNT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3839A09DQNT","canonicalUrl":"https://icboms.com/texas-instruments/TPS3839A09DQNT","factsUrl":"https://icboms.com/api/mcp/products/TPS3839A09DQNT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3839A09DQNT, Simple Reset/Power-On Reset, Active Low, Push-Pull/Totem Pole Output, 0.9V Threshold, 120ms Minimum Reset Timeout, -40°C~85°C, 4-X2SON (1x1) Package.","salesMarkdown":"## 0.9V threshold — the reset trip for low-voltage rails That 0.9V threshold is set for modern low-voltage core rails — think 1.0V or 1.2V DSP cores, FPGA logic banks, or MCU VDD — where a 0.9V trip point catches a brownout before the digital logic starts behaving unpredictably. ## 120 ms timeout — why it matters for startup sequencing That means after the monitored voltage rises above the threshold, the reset output stays asserted for at least 120 ms before releasing the processor. This gives the supply rail time to settle and the oscillator time to stabilize before the CPU starts executing code. If your system has a fast-ramping supply, the 120 ms window is generous enough to cover most ceramic-cap decoupling scenarios. ## Active-low push-pull output — no external pull-up needed The reset output is active low and push-pull (totem pole). That means the output drives both high and low — no open-drain, so you do not need an external pull-up resistor to VDD. The push-pull stage holds the reset line cleanly at ground during the fault condition and drives it to the supply rail when the timeout expires. This simplifies the BOM and saves a resistor per reset line. ## 1x1 mm X2SON — footprint and rework considerations The TPS3839A09DQNT comes in a 4-X2SON package measuring 1x1 mm (supplier device package 4-X2SON). That is a tiny, leadless package with an exposed pad underneath. For rework, the small pad area means the part is sensitive to solder-paste volume — too much paste and the part floats; too little and the pad wets poorly. A stencil aperture of about 75% of the pad area is a good starting point.","metaTitle":"TPS3839A09DQNT Simple Reset/Power-On Reset, 0.9V Threshold","metaDescription":"Texas Instruments TPS3839A09DQNT simple reset/power-on reset IC with 0.9V threshold, active-low push-pull output, 120ms timeout.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"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":"4-XDFN Exposed Pad","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":"4-X2SON (1x1)","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4198","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8db2a3e3b3bb51ea8ca211210c7cfea5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS3839A09DQNT/alternatives.json"},"ai":{"faq":[{"question":"Is TPS3839A09DQNT equivalent to TPS3839A09DQNR?","answer":"The TPS3839A09DQNT and TPS3839A09DQNR share the same base product number TPS3839 and the same electrical specifications (0.9V threshold, active-low push-pull output, 120 ms timeout). The difference is in the packaging and reel format — the 'NT' suffix indicates Tape & Reel or Cut Tape, while the 'NR' suffix is a different reel quantity or tape width. They are functionally identical and pin-compatible."},{"question":"What is the reset output type of TPS3839A09DQNT?","answer":"The reset output is active low with a push-pull (totem pole) output stage. It drives the reset line low when the monitored voltage falls below the threshold and drives it high after the timeout expires."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3839A09DQNT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3839A09DQNT when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}