{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS19AN","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS19AN","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS19AN","factsUrl":"https://icboms.com/api/mcp/products/SN74LS19AN","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series, SN74LS19AN, Hex Schmitt-Trigger Inverter, 6 circuits, 1 input per circuit, 30ns propagation delay @ 5V, 15pF, 400µA / 8mA output drive, 4.75V ~ 5.25V supply, 0°C ~ 70°C, 14-DIP (0.300\", 7.62mm) through-hole package, Tube.","salesMarkdown":"## 74LS hex Schmitt inverter — what it is and where it fits The SN74LS19AN is a hex inverter from the 74LS Schottky TTL family, with Schmitt-trigger inputs on all six gates. It takes a single input per inverter and outputs the logical complement, with built-in hysteresis that cleans up slow or noisy edges — useful for switch debouncing, oscillator circuits, or squaring up a waveform from a sensor. The 14-DIP through-hole package suits breadboard prototyping, legacy PCB retrofits, and designs that avoid surface-mount assembly. Supply range is 4.75 V to 5.25 V, commercial temperature grade 0°C to 70°C, so it is sized for benchtop, office, or indoor equipment — not the engine bay or a factory floor with wide thermal swings. ## 30 ns propagation delay — timing margin for a 5 V bus Maximum propagation delay is 30 ns at 5 V supply and 15 pF load. Output drive is 400 µA source and 8 mA sink. ## Active production — no LTB to plan around TI lists the SN74LS19AN as Active, ROHS3 compliant. For a BOM line that needs a through-hole Schmitt inverter, this part is still a standard catalog item — not an allocation play, not a shortage-era panic buy. The 74LS family is mature but not sunset; you can qualify it into a new design without worrying about an EOL notice next quarter.","metaTitle":"SN74LS19AN 74LS Hex Schmitt-Trigger Inverter, 30ns, 14-DIP","metaDescription":"SN74LS19AN is a 74LS hex inverter with Schmitt-trigger inputs, 30ns propagation delay at 5V, 15pF. Through-hole 14-DIP, 4.75-5.25V supply, 0-70°C.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Series":"74LS","Package":"Tube","Features":"Schmitt Trigger","Logic Type":"Inverter","Mounting Type":"Through Hole","Package / Case":"14-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Number of Inputs":"1","Voltage - Supply":"4.75V ~ 5.25V","Number of Circuits":"6","Operating Temperature":"0°C ~ 70°C","Input Logic Level - Low":"0.75V","Supplier Device Package":"14-PDIP","Input Logic Level - High":"2.15V","Current - Output High, Low":"400µA, 8mA","Max Propagation Delay @ V, Max CL":"30ns @ 5V, 15pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.26","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.26000","currency":"USD"},{"qty":10,"price":"$2.03100","currency":"USD"},{"qty":25,"price":"$1.91600","currency":"USD"},{"qty":100,"price":"$1.63240","currency":"USD"},{"qty":250,"price":"$1.53276","currency":"USD"},{"qty":500,"price":"$1.34116","currency":"USD"},{"qty":1000,"price":"$1.11125","currency":"USD"},{"qty":2500,"price":"$1.08450","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2605b60df47a86bf4579fd8a2ec77322.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the propagation delay and output drive of SN74LS19AN?","answer":"Output drive capability is 400 µA source and 8 mA sink."},{"question":"What is the difference between SN74LS19AN and SN74LS14AN?","answer":"Both are 74LS hex Schmitt-trigger inverters in 14-DIP packages with identical pinouts. The SN74LS19AN is functionally equivalent to the SN74LS14AN — the difference is in TI's internal test specifications, not in the published datasheet ratings. For all practical design and sourcing purposes, they are interchangeable."},{"question":"Can SN74LS19AN be replaced with 74HC14?","answer":"A 74HC14 (e.g., SN74HC14N) is a functional replacement — same hex Schmitt-inverter logic, same 14-DIP footprint. The key difference is logic family: 74HC runs on 2 V to 6 V supply, has CMOS input thresholds (roughly 0.3×VCC and 0.7×VCC), and faster propagation delay (~15 ns). The 74LS19AN uses TTL thresholds (0.75 V / 2.15 V) and a 5 V-only supply. If the downstream logic is 74LS or 5 V TTL, the 74LS19AN is the drop-in; if the rest of the board is HC/HCT, the 74HC14 is a better fit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS19AN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS19AN 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}}