{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM139AD","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM139AD","canonicalUrl":"https://icboms.com/texas-instruments/LM139AD","factsUrl":"https://icboms.com/api/mcp/products/LM139AD","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LM139AD, quad differential comparator, 14-SOIC package, single/dual supply 2V to 30V / ±1V to ±15V, 2mA max quiescent current, -55°C to 125°C operating temperature.","salesMarkdown":"## Supply voltage and quiescent current — design margin for rail selection The 2 V to 30 V single-supply range covers common industrial rails. The 2 mA maximum quiescent current (all four comparators) is moderate. The 0.1 µA maximum input bias current at 5 V suits high-impedance sources. ## Input offset and output flexibility — threshold accuracy and logic interface Maximum input offset voltage is 2 mV at 30 V supply. The open-collector outputs allow wired-OR connections and level translation. CMOS/MOS and TTL output compatibility means no extra level-shifter for mixed-voltage boards. ## Package and mounting — 14-SOIC footprint for automated assembly The 14-SOIC (0.154\", 3.90 mm width) package is a standard surface-mount footprint shared by many quad op-amps and comparators. The supplier device package is also 14-SOIC, so the PCB land pattern is consistent across the TI/ST/ADI equivalents. ## Lifecycle and compliance — active, no obsolescence risk The LM139AD is listed as Active with ROHS3 compliance. This part is suitable for new designs and long-life production BOMs without near-term supply risk. The active status means standard lead times apply through the distribution channel; no premium or broker sourcing is required for normal procurement.","metaTitle":"LM139AD Quad Differential Comparator, 14-SOIC","metaDescription":"ST LM139AD quad differential comparator in 14-SOIC. 2V to 30V single supply, 2mA quiescent max, -55°C to 125°C. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Differential","Package":"Tube","Output Type":"CMOS, MOS, Open-Collector, TTL","Mounting Type":"Surface Mount","Package / Case":"14-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Number of Elements":"4","Operating Temperature":"-55°C ~ 125°C","Current - Output (Typ)":"20mA","Supplier Device Package":"14-SOIC","Current - Quiescent (Max)":"2mA","Current - Input Bias (Max)":"0.1µA @ 5V","Voltage - Input Offset (Max)":"2mV @ 30V","Voltage - Supply, Single/Dual (±)":"2V ~ 30V, ±1V ~ 15V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.0","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.00000","currency":"USD"},{"qty":10,"price":"$4.49300","currency":"USD"},{"qty":25,"price":"$4.24760","currency":"USD"},{"qty":100,"price":"$3.68130","currency":"USD"},{"qty":250,"price":"$3.49256","currency":"USD"},{"qty":500,"price":"$3.13384","currency":"USD"},{"qty":1000,"price":"$2.67150","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/01d017d5c3c4e323e53d322683ed2720.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What are the direct equivalents or replacements for LM139AD?","answer":"The LM139AD is a standard quad differential comparator in 14-SOIC. Pin-compatible equivalents include the TI LM139AD and the Analog Devices (ADI) quad comparator in the same footprint. The TLV9032DDFR is a different class — a dual, rail-to-rail, push-pull comparator with 100 ns propagation delay, not a direct functional replacement for the LM139AD's open-collector, wide-supply, quad configuration."},{"question":"What is LM139AD's listed type (Differential) on this component line?","answer":"The listed type is Differential, meaning the comparator responds to the difference between its non-inverting and inverting inputs, not to a single-ended voltage relative to ground. This is standard for all comparators; the term distinguishes it from single-ended or rail-to-rail input structures."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM139AD","citationPolicyUrl":"https://icboms.com/llms.txt","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}