{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX921ESA+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX921ESA","canonicalUrl":"https://icboms.com/analog-devices/MAX921ESA","factsUrl":"https://icboms.com/api/mcp/products/MAX921ESA%2B","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices MAX921ESA+ single comparator with integrated voltage reference, 8-SOIC surface-mount package, 2.5V to 11V supply, 5µA quiescent current, 50mV hysteresis, CMOS/TTL output.","salesMarkdown":"## 8-SOIC comparator with on-chip reference The MAX921ESA+ is a single comparator with an integrated voltage reference, housed in an 8-SOIC package (0.154\" width, 3.90 mm body). The built-in reference saves an external component and one PCB trace — useful when board area is tight and the reference voltage doesn't need to be shared across multiple channels. Supply range spans 2.5 V to 11 V single, or ±1.25 V to ±5.5 V dual. The 5 µA max quiescent current makes it a candidate for battery-powered threshold detectors where the comparator sits powered continuously. Output swings CMOS or TTL levels and can source up to 50 mA typical — enough to drive a small relay coil or an optocoupler LED directly without a buffer transistor. ## 50 mV hysteresis and 12 µs propagation delay Built-in 50 mV hysteresis prevents output chatter when the input signal crosses the threshold slowly. For a thermistor bridge or a slow-moving analog sensor, this eliminates the need for external positive feedback resistors. Maximum propagation delay is 12 µs. That sets the upper limit on how fast the comparator can toggle — adequate for DC threshold detection and low-frequency window comparators, but not for high-speed zero-crossing or PWM edge detection above roughly 40 kHz. Input offset voltage is 10 mV max at 5 V supply. The integrated reference's accuracy dominates the threshold error budget, so the offset matters most when the external signal is compared against a voltage near the reference value. ## Active production, ROHS3, industrial temp range Common-mode and power-supply rejection are both 80 dB typical. In a noisy 24 V industrial backplane stepped down to 5 V, the 80 dB PSRR attenuates rail ripple by a factor of 10,000 — the comparator's threshold stays stable within a few hundred microvolts.","metaTitle":"MAX921ESA+ Analog Devices Comparator w/ Voltage Ref, 8-SOIC","metaDescription":"MAX921ESA+ single comparator with integrated voltage reference. 2.5V to 11V supply, 5µA quiescent, 50mV hysteresis. Active, ROHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"with Voltage Reference","Package":"Tube","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":"$7.64","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$7.64000","currency":"USD"},{"qty":10,"price":"$6.90500","currency":"USD"},{"qty":25,"price":"$6.58400","currency":"USD"},{"qty":100,"price":"$5.71700","currency":"USD"},{"qty":250,"price":"$5.46008","currency":"USD"},{"qty":500,"price":"$4.97828","currency":"USD"},{"qty":1000,"price":"$4.33593","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/68baf7773b4f6f6f86b42323e5d5c854.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does MAX921ESA+ come in?","answer":"The supplier device package is 8-SOIC. The tube packaging is standard for prototyping and low-volume assembly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX921ESA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX921ESA when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}