{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3305-33DR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3305-33DR","canonicalUrl":"https://icboms.com/texas-instruments/TPS3305-33DR","factsUrl":"https://icboms.com/api/mcp/products/TPS3305-33DR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3305-33DR multi-voltage supervisor, monitors 2 supplies, thresholds 2.93V and 4.55V, reset timeout 140ms min, push-pull active high/active low outputs, -40°C to 85°C, 8-SOIC package.","salesMarkdown":"## Two-rail watchdog for 3.3V and 5V supplies It is designed for systems that require sequential or simultaneous monitoring of both a 3.3V and a 5V rail — common in mixed-voltage designs with FPGAs, DSPs, or MCUs that power I/O banks from one rail and the core from the other. ## Thresholds that match the rails The monitored thresholds are 2.93V and 4.55V. The 2.93V threshold suits a nominal 3.3V supply with a typical undervoltage trip around 2.93V — about 11% below nominal. The 4.55V threshold matches a 5V rail with a similar margin. If your system runs 3.3V and 5V, these thresholds are a direct fit; if you need tighter tolerance monitoring (e.g., a 1.8V or 2.5V rail), this part does not cover it. ## 140 ms reset hold — enough for most supplies The reset timeout is 140 ms minimum. It is short enough that the system wake-up delay is acceptable for industrial controllers and telecom line cards, but if your design requires a longer reset pulse (e.g., for a slow-start power module), you will need an external timer or a supervisor with a programmable delay. ## Push-pull outputs, both polarities The TPS3305-33DR provides both active-high and active-low reset outputs in a push-pull, totem-pole configuration. No external pull-up resistor is needed on either output. The active-high output can directly enable a power-good LED or a logic gate; the active-low output connects directly to the /RESET pin of most MCUs and FPGAs. ## 8-SOIC footprint, industrial temperature Packaged in an 8-SOIC (3.90 mm width) body, surface-mount. The junction temperature rating (TJ) matches the ambient range — no derating needed for typical use at 85°C ambient. For new designs, this means no near-term supply discontinuity; for existing BOMs, it is safe to continue specifying without an imminent obsolescence watch.","metaTitle":"TPS3305-33DR Multi-Voltage Supervisor","metaDescription":"Texas Instruments TPS3305-33DR multi-voltage supervisor monitors two supplies with 2.93V and 4.55V thresholds.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Type":"Multi-Voltage Supervisor","Reset":"Active High/Active Low","Output":"Push-Pull, Totem Pole","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Reset Timeout":"140ms Minimum","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Base Product Number":"TPS3305","Voltage - Threshold":"2.93V, 4.55V","Operating Temperature":"-40°C~85°C(TJ)","Supplier Device Package":"8-SOIC","Number of Voltages Monitored":"2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.8300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/bd03fa4e6c734212c88b5d1bdcc4e27a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS3305-33DR/alternatives.json"},"ai":{"faq":[{"question":"What supply voltages does the TPS3305-33DR monitor?","answer":"It monitors two voltages with thresholds of 2.93V and 4.55V. These map directly to nominal 3.3V and 5V rails. The part does not monitor 1.8V, 2.5V, or other common lower-voltage rails."},{"question":"What is the reset timeout of the TPS3305-33DR?","answer":"The reset timeout is 140 ms minimum. This is the time the reset outputs remain asserted after all monitored voltages rise above their thresholds."},{"question":"Does the TPS3305-33DR need an external pull-up resistor on the reset output?","answer":"No. The reset outputs are push-pull, totem-pole. Both the active-high and active-low outputs can drive logic inputs directly without a pull-up or pull-down resistor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3305-33DR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3305-33DR 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}}