{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS139AN","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS139AN","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS139AN","factsUrl":"https://icboms.com/api/mcp/products/SN74LS139AN","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series Decoder/Demultiplexer, SN74LS139AN, 1 x 2:4 circuit, 4.75V ~ 5.25V supply, 0°C ~ 70°C, 16-DIP through-hole package.","salesMarkdown":"## Active production — still a BOM-safe choice for 5V TTL decoding The SN74LS139AN: This is a 74LS-series dual 1-of-4 decoder/demultiplexer in a 16-pin DIP package. The 1 x 2:4 circuit means each of the two independent decoders takes a 2-bit binary input and asserts one of four active-low outputs — a standard building block for memory address decoding, I/O expansion, or routing control signals in 5V TTL logic systems. ## 4.75V ~ 5.25V supply — the classic 5V TTL rail with guard bands The supply range of 4.75V to 5.25V is the standard 5V TTL operating window with ±5% tolerance. This means the part runs on a regulated 5V rail without needing a separate supply — the single-supply architecture keeps the BOM simple. The 400 µA output high and 8 mA output low current drive is typical for 74LS logic: enough to drive one or two standard TTL loads but not a heavy capacitive bus without a buffer. This limits deployment to indoor, temperature-controlled environments — office equipment, lab instruments, or benchtop prototypes. For industrial or automotive enclosures that see -40°C or 85°C ambient, a 74LS part in this package is not the right fit; a 74HC or 74ACT variant in a wider temperature grade would be needed. ## 16-DIP through-hole — breadboard-friendly, easy to stock The 16-DIP (0.300\", 7.62mm) through-hole package is one of the most serviceable logic packages in existence. It fits standard breadboards, prototyping boards, and 0.100-inch pitch perfboard without special soldering equipment. The 16-PDIP supplier device package is the same mechanical outline — the part sits in a DIP-16 socket or solders directly into plated through-holes. For a spare-parts bin, DIP packages store well: no moisture sensitivity level (MSL) concerns, no reel humidity monitoring, and the tube packaging keeps the leads aligned. The ROHS3 compliance means no restricted substances in the solder finish — it is compatible with lead-free assembly lines without process change.","metaTitle":"SN74LS139AN 74LS Decoder/Demultiplexer, 1x2:4, 16-DIP","metaDescription":"SN74LS139AN active 74LS decoder/demultiplexer, 1 x 2:4 circuit, 4.75-5.25V supply, 0-70°C, 16-DIP. ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Type":"Decoder/Demultiplexer","Series":"74LS","Circuit":"1 x 2:4","Package":"Tube","Mounting Type":"Through Hole","Package / Case":"16-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Independent Circuits":"2","Operating Temperature":"0°C ~ 70°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"16-PDIP","Current - Output High, Low":"400µA, 8mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.97","priceTiers":[{"qty":1,"price":"$0.97000","currency":"USD"},{"qty":10,"price":"$0.85700","currency":"USD"},{"qty":25,"price":"$0.80520","currency":"USD"},{"qty":100,"price":"$0.65700","currency":"USD"},{"qty":250,"price":"$0.61028","currency":"USD"},{"qty":500,"price":"$0.51940","currency":"USD"},{"qty":1000,"price":"$0.41552","currency":"USD"},{"qty":2500,"price":"$0.37656","currency":"USD"},{"qty":5000,"price":"$0.36750","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/85c2ae232b54df5f14f893d466e9496b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74LS139AN/alternatives.json"},"ai":{"faq":[{"question":"What is the SN74LS139AN used for?","answer":"The SN74LS139AN is a dual 1-of-4 decoder/demultiplexer. It takes a 2-bit binary address input and asserts one of four active-low outputs. Typical applications include memory address decoding in 5V TTL systems, routing control signals to peripheral chips, and implementing simple demultiplexing in logic circuits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS139AN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS139AN 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}}