{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM239J","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM239J","canonicalUrl":"https://icboms.com/texas-instruments/LM239J","factsUrl":"https://icboms.com/api/mcp/products/LM239J","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM239J quad general-purpose comparator, 14-CDIP (0.300\", 7.62mm) through-hole package, 4 elements, 2V to 36V supply, 16mA output, active production.","salesMarkdown":"## Quad comparator in a ceramic DIP — field-swappable and wide-supply The LM239J: Four independent comparators in one ceramic DIP — useful where you need multiple threshold detections or window comparators on a single IC, and the ceramic body handles higher-temperature soldering and rework cycles better than plastic. The wide common-mode input range includes ground, so it can sense near-zero signals directly. Output stage is open-collector compatible with CMOS, DTL, ECL, MOS, and TTL logic families — the pull-up resistor sets the logic-high level, making it easy to interface to any downstream logic voltage without a level shifter. ## What the key specs mean for your circuit Output sink current is 16mA typical at 5V — enough to drive a standard TTL load or an LED indicator directly, but not a relay coil without a buffer transistor. The open-collector output can sink up to that current while pulling the output low. Input offset voltage is 5mV max at 30V supply — this sets the smallest detectable voltage difference between the two inputs. For a 5V system, a 5mV offset means the comparator triggers within 0.1% of the set point, which is adequate for most threshold and window detection tasks. Input bias current is 0.25µA max at 5V — low enough that high-impedance sources (like a 100kΩ voltage divider) won't see significant voltage drop from the bias current. The voltage error from bias current into a 100kΩ source is 25mV, which may matter in precision applications. Quiescent current is 2.5mA max for all four comparators — about 0.6mA per channel. Not a low-power part for battery operation, but reasonable for industrial control panels where the supply can spare a few milliamps. Operating temperature range is -25°C to 85°C — industrial grade, suitable for factory-floor control cabinets, HVAC equipment, and outdoor telecom shelters. The 14-CDIP ceramic package gives better thermal cycling endurance than plastic DIP — useful in applications with frequent power cycling or where the board sees temperature swings. The through-hole mounting means it can be socketed for field replacement without soldering.","metaTitle":"Texas Instruments LM239J Quad Comparator, 14-CDIP, Active","metaDescription":"Texas Instruments LM239J quad general-purpose comparator in 14-CDIP package. Active production, ROHS3 compliant. 2V to 36V supply, 4 elements, 16mA output.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"General Purpose","Package":"Tube","Output Type":"CMOS, DTL, ECL, MOS, Open-Collector, TTL","Mounting Type":"Through Hole","Package / Case":"14-CDIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Number of Elements":"4","Operating Temperature":"-25°C ~ 85°C","Current - Output (Typ)":"16mA @ 5V","Supplier Device Package":"14-CDIP","Current - Quiescent (Max)":"2.5mA","Current - Input Bias (Max)":"0.25µA @ 5V","Voltage - Input Offset (Max)":"5mV @ 30V","Voltage - Supply, Single/Dual (±)":"2V ~ 36V, ±1V ~ 18V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$16.55","priceTiers":[{"qty":1,"price":"$16.55000","currency":"USD"},{"qty":10,"price":"$15.21300","currency":"USD"},{"qty":25,"price":"$14.58200","currency":"USD"},{"qty":100,"price":"$12.84790","currency":"USD"},{"qty":250,"price":"$12.21736","currency":"USD"},{"qty":500,"price":"$11.42914","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/26674860f8bd14f32676bca891a34698.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM239J/alternatives.json"},"ai":{"faq":[{"question":"What package does LM239J come in?","answer":"14-CDIP (0.300\", 7.62mm) ceramic dual-in-line package, through-hole mounting. The ceramic body handles higher-temperature soldering and rework better than plastic DIP."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM239J","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM239J when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}