{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX821MUS+T","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX821MUST","canonicalUrl":"https://icboms.com/analog-devices/MAX821MUST","factsUrl":"https://icboms.com/api/mcp/products/MAX821MUS%2BT","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX821MUS+T, Simple Reset/Power-On Reset, Active Low, Push-Pull Output, 4.38V Threshold, SOT-143-4, -40°C to 125°C.","salesMarkdown":"## What the MAX821MUS+T is and where it fits The Maxim Integrated MAX821MUS+T is a Simple Reset/Power-On Reset supervisor IC that monitors a single voltage rail and asserts a reset signal when the supply drops below the threshold. It is designed for microprocessor, microcontroller, and logic-system power monitoring where a clean, glitch-free reset is required on power-up or brownout. The reset output is active low and uses a push-pull, totem-pole stage, so no external pull-up resistor is needed. The reset timeout is adjustable or selectable, giving the designer flexibility to match the downstream device's startup timing. Housed in a SOT-143-4 surface-mount package, it occupies minimal board area and is suited for compact designs in industrial control, automotive electronics, and telecom infrastructure where the -40°C to 125°C operating temperature range is required. ## Lifecycle and sourcing note The MAX821MUS+T carries an Active lifecycle status and is ROHS3 compliant, so it remains a current-production part suitable for new designs and production replenishment.","metaTitle":"MAX821MUS+T Simple Reset/Power-On Reset IC, 4.38V Threshold","metaDescription":"MAX821MUS+T is an active Simple Reset/Power-On Reset IC from Maxim Integrated. Active-low push-pull output, 4.38V threshold, -40°C to 125°C range.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"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":"4.38V","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"SOT-143-4","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.54","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.54000","currency":"USD"},{"qty":10,"price":"$3.17700","currency":"USD"},{"qty":25,"price":"$3.00360","currency":"USD"},{"qty":100,"price":"$2.60330","currency":"USD"},{"qty":250,"price":"$2.46980","currency":"USD"},{"qty":500,"price":"$2.21612","currency":"USD"},{"qty":1000,"price":"$1.86903","currency":"USD"},{"qty":2500,"price":"$1.75972","currency":"USD"},{"qty":5000,"price":"$1.69357","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX821-MAX822T.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the exact reset threshold voltage of MAX821MUS+T?","answer":"The reset threshold voltage is 4.38V, suitable for monitoring a 5V nominal supply rail."},{"question":"What package does MAX821MUS+T come in?","answer":"It comes in a SOT-143-4 surface-mount package, also described as TO-253-4 or TO-253AA. The supplier device package is SOT-143-4."},{"question":"Is MAX821MUS+T RoHS compliant?","answer":"Yes, it is ROHS3 compliant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX821MUST","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX821MUST 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}}