{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS126AD","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS126AD","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS126AD","factsUrl":"https://icboms.com/api/mcp/products/SN74LS126AD","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series SN74LS126AD, Buffer Non-Inverting, 4.75V ~ 5.25V supply, 3-State output, 14-SOIC package, 0°C ~ 70°C.","salesMarkdown":"## Quad 3-state buffer for 5V TTL buses It operates from a 4.75V to 5.25V supply and drives 3-state outputs that sink 24mA or source 2.6mA, matching standard TTL fan-out requirements for bus-oriented logic. The 14-SOIC package suits surface-mount assembly on mixed-technology boards where a small footprint is needed for line driving or bus isolation. ## 5V-only supply — no 3.3V operation The supply range is strictly 4.75V to 5.25V, so this part cannot be used in a 3.3V system without a level translator. The 74LS logic family is designed for 5V TTL rails; the input thresholds and output levels are not compatible with lower-voltage logic families like LVC or LVTH. If your bus is 3.3V, look at the 74LVTH or 74LVC series instead. It is not specified for industrial or automotive temperature ranges, so avoid it in outdoor telecom, engine-bay electronics, or factory-floor applications that see -40°C or 85°C+. ## Output current: 24mA sink, 2.6mA source The asymmetric drive — 24mA low-level sink versus 2.6mA high-level source — is typical of TTL outputs. When driving a capacitive load or a long trace, the rise time will be slower than the fall time because the source current is roughly one-tenth the sink current. Budget extra propagation delay on the rising edge if the load exceeds a few TTL gate inputs. ## Active lifecycle, ROHS3 compliant The ROHS3 compliance covers the EU RoHS directive, including the exemption for lead in solder — the part is lead-free compatible.","metaTitle":"SN74LS126AD 74LS Quad Buffer, 3-State, 14-SOIC, 5V","metaDescription":"TI SN74LS126AD quad non-inverting buffer with 3-state outputs. 4.75V-5.25V supply, 24mA sink, 2.6mA source. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"74LS","Package":"Tube","Logic Type":"Buffer, Non-Inverting","Output Type":"3-State","Mounting Type":"Surface Mount","Package / Case":"14-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Number of Elements":"4","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"14-SOIC","Current - Output High, Low":"2.6mA, 24mA","Number of Bits per Element":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.93","priceTiers":[{"qty":1,"price":"$0.93000","currency":"USD"},{"qty":10,"price":"$0.83200","currency":"USD"},{"qty":25,"price":"$0.78960","currency":"USD"},{"qty":100,"price":"$0.64850","currency":"USD"},{"qty":250,"price":"$0.60620","currency":"USD"},{"qty":500,"price":"$0.53572","currency":"USD"},{"qty":1000,"price":"$0.42294","currency":"USD"},{"qty":2500,"price":"$0.39900","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6403b1d098d080a8dc324c36f013c665.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74LS126AD/alternatives.json"},"ai":{"faq":[{"question":"Can I use SN74LS126AD in a 3.3V system?","answer":"No, the supply range is 4.75V to 5.25V only. The 74LS logic family is not compatible with 3.3V rails. For 3.3V operation, consider the 74LVTH or 74LVC series."},{"question":"What is the difference between SN74LS126AD and SN74LS125AD?","answer":"The SN74LS126AD has active-high output enables (buffer enabled when the enable pin is high), while the SN74LS125AD uses active-low enables (buffer enabled when the enable pin is low). Functionally and pin-compatible otherwise."},{"question":"Is SN74LS126AD RoHS compliant?","answer":"Yes, it is ROHS3 compliant, meeting the EU RoHS directive requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS126AD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS126AD 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}}