{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX821UUS+T","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX821UUST","canonicalUrl":"https://icboms.com/analog-devices/MAX821UUST","factsUrl":"https://icboms.com/api/mcp/products/MAX821UUS%2BT","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX821UUS+T, Simple Reset/Power-On Reset, 1 Channel, Active Low, Push-Pull Output, 2.78V Threshold, Adjustable Timeout, SOT-143-4, -40°C to 125°C.","salesMarkdown":"## Active lifecycle — no LTB clock ticking No last-time-buy notice, no NRND flag, and no end-of-life horizon on the ledger. For a BOM freeze or a new design, that removes the sourcing risk of an imminent discontinuation. ## Temperature grade — industrial to under-hood range Rated for -40°C to 125°C ambient, the MAX821UUS+T covers industrial control cabinets, outdoor telecom enclosures, and automotive under-hood environments. ## Push-pull output — no external pull-up resistor The push-pull (totem-pole) output drives the reset line high or low without needing an external pull-up. That saves a resistor and one PCB trace, which matters on dense boards or when the reset net is shared across multiple loads. Active-low polarity is the common convention for microcontroller reset pins — the supervisor pulls the line low on a fault and releases it high when the supply is valid. ## Sourcing this part MAX821UUS+T is sourced through independent distribution channels and quoted to order against an RFQ. If you are qualifying this for a production BOM, the active lifecycle and ROHS3 compliance clear the two main gates. Submit an RFQ for a firm price and delivery window.","metaTitle":"MAX821UUS+T Simple Reset/Power-On Reset, 2.78V Threshold","metaDescription":"MAX821UUS+T is an active Simple Reset/Power-On Reset IC with 2.78V threshold, push-pull output, adjustable timeout, SOT-143-4. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"Simple Reset/Power-On Reset","Reset":"Active Low","Output":"Push-Pull, Totem Pole","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Reset Timeout":"Adjustable/Selectable","Package / Case":"TO-253-4, TO-253AA","lifecycle_stage":"eol_hot","Voltage - Threshold":"2.78V","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"SOT-143-4","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.24","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.24000","currency":"USD"},{"qty":10,"price":"$2.90900","currency":"USD"},{"qty":25,"price":"$2.74960","currency":"USD"},{"qty":100,"price":"$2.38310","currency":"USD"},{"qty":250,"price":"$2.26088","currency":"USD"},{"qty":500,"price":"$2.02868","currency":"USD"},{"qty":1000,"price":"$1.71094","currency":"USD"},{"qty":2500,"price":"$1.62539","currency":"USD"},{"qty":5000,"price":"$1.56429","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX821-MAX822T.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the reset output type of MAX821UUS+T?","answer":"The reset output is active-low, push-pull (totem pole). It drives the reset line low on a fault and releases it high when the supply is valid, with no external pull-up resistor required."},{"question":"Does MAX821UUS+T have an adjustable reset timeout?","answer":"Yes, the reset timeout is adjustable/selectable, allowing the designer to set the reset pulse duration to match the processor's power-up settling time."},{"question":"Is MAX821UUS+T compatible with 3.3V systems?","answer":"Yes, the 2.78V threshold is designed for 3.3V rails. It asserts reset before the supply drops into the undefined-logic region of 3.3V logic, while providing enough margin to avoid nuisance trips on normal ripple."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX821UUST","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX821UUST when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}