{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX921ESA+T","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX921ESAT","canonicalUrl":"https://icboms.com/analog-devices/MAX921ESAT","factsUrl":"https://icboms.com/api/mcp/products/MAX921ESA%2BT","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX921ESA+T, single comparator with integrated voltage reference, 5µA max quiescent current, 50mV hysteresis, CMOS/TTL output, 8-SOIC surface mount, -40°C to 85°C.","salesMarkdown":"## What the MAX921ESA+T is and where it fits The MAX921ESA+T from Maxim Integrated is a single comparator with an integrated voltage reference, combining threshold detection and a precision 1.182V reference in one 8-SOIC package. It is designed for battery-powered threshold monitoring, undervoltage/overvoltage detection, and window comparators where every microamp counts. The built-in 50mV hysteresis eliminates the need for external positive feedback resistors, saving board space and BOM cost. The 5µA max quiescent current makes it a strong fit for always-on sensor monitors, portable instrumentation, and industrial control loops that must stay alive on a coin cell or energy-harvesting supply. The 2.5V to 11V single-supply range (or ±1.25V to ±5.5V dual) covers common 3.3V and 5V rails with headroom for 12V industrial buses. ## Industrial temperature range and environment Rated for -40°C to 85°C operation, the MAX921ESA+T suits outdoor telecom cabinets, factory-floor sensors, engine-bay monitors (non-AEC), and HVAC controllers. The 80dB CMRR and PSRR keep threshold accuracy stable across supply droops and common-mode shifts common in noisy industrial backplanes. ## Output drive and response time The CMOS/TTL output can sink or source 50mA typical, enough to drive a small relay coil, an LED indicator, or the enable pin of a downstream regulator directly. The 12µs max propagation delay is adequate for DC threshold and low-frequency monitoring; for high-speed PWM or zero-crossing detection, a faster comparator family would be needed. ## Sourcing and lifecycle The MAX921ESA+T is listed as Active and ROHS3 compliant. There is no NRND or LTB flag, so it remains a safe choice for new designs and production replenishment.","metaTitle":"MAX921ESA+T Comparator with Voltage Reference, 5µA, 8-SOIC","metaDescription":"MAX921ESA+T single comparator with integrated 1.182V reference. 5µA quiescent current, 50mV hysteresis, industrial temp range. Active, RoHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"with Voltage Reference","Package":"Tape & Reel (TR); Cut Tape (CT)","Hysteresis":"50mV","Output Type":"CMOS, TTL","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","CMRR, PSRR (Typ)":"80dB CMRR, 80dB PSRR","Number of Elements":"1","Operating Temperature":"-40°C ~ 85°C","Current - Output (Typ)":"50mA","Propagation Delay (Max)":"12µs","Supplier Device Package":"8-SOIC","Current - Quiescent (Max)":"5µA","Voltage - Input Offset (Max)":"10mV @ 5V","Voltage - Supply, Single/Dual (±)":"2.5V ~ 11V, ±1.25V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.76","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$7.76000","currency":"USD"},{"qty":10,"price":"$7.01400","currency":"USD"},{"qty":25,"price":"$6.68760","currency":"USD"},{"qty":100,"price":"$5.80690","currency":"USD"},{"qty":250,"price":"$5.54592","currency":"USD"},{"qty":500,"price":"$5.05656","currency":"USD"},{"qty":1000,"price":"$4.40410","currency":"USD"},{"qty":2500,"price":"$4.24099","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/68baf7773b4f6f6f86b42323e5d5c854.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the MAX921ESA+T's key advantage over a standard comparator?","answer":"The integrated 1.182V voltage reference and 50mV hysteresis eliminate external resistors and a reference IC, saving board space and BOM cost. The 5µA quiescent current is also significantly lower than most general-purpose comparators."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX921ESAT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX921ESAT 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}}