{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3851G33SDRBR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3851G33SDRBR","canonicalUrl":"https://icboms.com/texas-instruments/TPS3851G33SDRBR","factsUrl":"https://icboms.com/api/mcp/products/TPS3851G33SDRBR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3851G33SDRBR, Simple Reset/Power-On Reset, Active Low, Open Drain, 3.3V Threshold, 170ms Reset Timeout, -40°C to 125°C, 8-VDFN Exposed Pad / 8-SON (3x3), Surface Mount.","salesMarkdown":"## 3.3V rail watchdog — what the TPS3851G33SDRBR does It holds the reset active for a minimum of 170ms after the supply returns above threshold, giving the system time to stabilize before the processor or logic starts executing. ## 170ms reset timeout — why it matters for power sequencing The 170ms minimum reset timeout is the period the output stays low after the monitored 3.3V rail rises above the threshold. This gives the oscillator, PLL, and internal voltage regulators time to settle before the processor releases from reset. If your MCU or FPGA requires a longer startup delay, you will need an external RC or a programmable supervisor — this part's timeout is fixed. ## Active low, open drain — connecting to the reset input The open-drain output pulls low when the supply is below threshold or during the timeout period. ## 8-SON package — rework and footprint notes The 8-SON (3x3 mm) package with exposed pad is a small DFN-style part. Reworking this package is straightforward with hot air, but the small size means the part can shift during reflow if the solder paste volume on the thermal pad is not controlled. ## Temperature range and deployment environments It can sit in outdoor telecom cabinets, engine bay electronics, factory floor PLCs, or any 3.3V system that must survive cold starts and hot soak conditions. The wide temperature range does not degrade the reset threshold accuracy — the datasheet specifies threshold tolerance across the full range.","metaTitle":"TPS3851G33SDRBR Simple Reset/Power-On Reset, 3.3V Threshold","metaDescription":"Texas Instruments TPS3851G33SDRBR simple reset/power-on reset IC.","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":"Open Drain or Open Collector","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Reset Timeout":"170ms Minimum","Package / Case":"8-VDFN Exposed Pad","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"TPS3851","Voltage - Threshold":"3.3V","Operating Temperature":"-40°C~125°C(TJ)","Supplier Device Package":"8-SON (3x3)","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9345","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8b12e106fffde0cd8e50687639f4b04b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS3851G33SDRBR/alternatives.json"},"ai":{"faq":[{"question":"What is the reset timeout of TPS3851G33SDRBR?","answer":"The reset timeout is a minimum of 170ms. After the 3.3V supply rises above the threshold, the open-drain output stays low for at least 170ms before releasing, giving the system time to power up cleanly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3851G33SDRBR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3851G33SDRBR 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}}