{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS156NSR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS156NSR","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS156NSR","factsUrl":"https://icboms.com/api/mcp/products/SN74LS156NSR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series Decoder/Demultiplexer, SN74LS156NSR, 2 x 1:4 circuit, 1 independent circuit, 4.75V ~ 5.25V supply, 16-SOIC package, 0°C ~ 70°C.","salesMarkdown":"## Dual 1:4 decoder/demux in a 16-SOIC footprint The SN74LS156NSR is a dual 1:4 decoder/demultiplexer from the 74LS series, packing two independent 1:4 demux circuits into a single 16-SOIC package. Each section selects one of four outputs based on two address lines, with a common enable per section. ## Output drive and what it means for bus loading The outputs source 100 µA and sink 8 mA — the sink current is the figure that matters when driving TTL inputs or LED indicators. A standard LS TTL input requires about 0.4 mA at logic low, so one output can drive up to 20 such loads without exceeding the sink rating. The high-level output current is only 100 µA, which means the part is not designed to source significant current — it pulls outputs low to sink load current, typical for open-collector or totem-pole LS logic driving into a pull-up or a CMOS input with high impedance. ## Package and board-fit for the pick-and-place line Housed in a 16-SOIC (0.209\", 5.30 mm width) with a supplier device package of 16-SO, the footprint is standard for SOIC-16 wide-body. The 1.27 mm pitch and gull-wing leads place well on standard reflow profiles with no tombstoning risk if the pad geometry follows the IPC-7351 standard. ## Lifecycle and compliance documentation RoHS3 compliance (2011/65/EU + 2015/863) means the part is free of the ten restricted substances including the four phthalates — no exemption expiry to track for EU-market equipment.","metaTitle":"SN74LS156NSR Decoder/Demux, 2x1:4, 16-SOIC, 5V","metaDescription":"Texas Instruments SN74LS156NSR dual 1:4 decoder/demultiplexer, 4.75-5.25V supply, 0-70°C, 16-SOIC. Active, RoHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Interface & Transceivers"],"specifications":{"Type":"Decoder/Demultiplexer","Series":"74LS","Circuit":"2 x 1:4","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.209\\\", 5.30mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Independent Circuits":"1","Operating Temperature":"0°C ~ 70°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"16-SO","Current - Output High, Low":"100µA, 8mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.0","priceTiers":[{"qty":1,"price":"$1.00000","currency":"USD"},{"qty":10,"price":"$0.89400","currency":"USD"},{"qty":25,"price":"$0.84880","currency":"USD"},{"qty":100,"price":"$0.69730","currency":"USD"},{"qty":250,"price":"$0.65180","currency":"USD"},{"qty":500,"price":"$0.57600","currency":"USD"},{"qty":1000,"price":"$0.45474","currency":"USD"},{"qty":2000,"price":"$0.42900","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4dedc80a424e5f4177e918b71ffe96b1.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74LS156NSR/alternatives.json"},"ai":{"faq":[{"question":"What package does the SN74LS156NSR come in?","answer":"It is supplied in a 16-SOIC package (0.209\", 5.30 mm width), also referred to as 16-SO by the supplier. The footprint is the standard wide-body SOIC-16 with 1.27 mm pitch."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS156NSR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS156NSR 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}}