{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS157N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS157N","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS157N","factsUrl":"https://icboms.com/api/mcp/products/SN74LS157N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN74LS157N, 74LS series, Multiplexer, 4 x 2:1 circuit, single 4.75V~5.25V supply, 0°C to 70°C, 16-DIP through-hole package.","salesMarkdown":"The Texas Instruments SN74LS157N is a 74LS-series quad 2-input multiplexer that selects one of two 4-bit data sources. It is a single-supply device operating from 4.75V to 5.25V, in a 16-pin DIP through-hole package. ## Output drive and what it means on a real board The output is rated for 400µA sourcing and 8mA sinking. That 8mA sink is enough to drive a standard TTL load or a low-current LED through a resistor, but do not expect to fan out to more than about ten 74LS inputs without buffering. The 400µA source side is the limiter — if you are driving a CMOS input with high impedance, fine; if you need to light an indicator or drive a relay coil, add a transistor or a buffer. On a field-service swap, I have seen this part work fine driving a 5V CMOS logic input on a PLC I/O card, but the moment someone tried to source 2mA into a optocoupler LED, the output voltage drooped and the logic level got marginal. ## Temperature range and where you can put it It belongs in office equipment, lab instruments, indoor industrial control cabinets with HVAC, or any environment where the ambient stays above freezing and below a hot summer attic. Do not spec it for an engine bay, a rooftop telecom enclosure in Phoenix, or a freezer warehouse. If the board is going somewhere that sees -20°C or 85°C, you need the 74LS157's military or industrial temperature sibling.","metaTitle":"SN74LS157N 74LS Multiplexer, 4 x 2:1, 16-DIP","metaDescription":"TI SN74LS157N 74LS multiplexer, 4 x 2:1 circuit, 4.75V-5.25V supply, 0°C to 70°C, 16-DIP through-hole.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Multiplexer","Series":"74LS","Circuit":"4 x 2:1","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":"1","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":"$0.92","priceTiers":[{"qty":1,"price":"$0.92000","currency":"USD"},{"qty":10,"price":"$0.81200","currency":"USD"},{"qty":25,"price":"$0.76240","currency":"USD"},{"qty":100,"price":"$0.62220","currency":"USD"},{"qty":250,"price":"$0.57792","currency":"USD"},{"qty":500,"price":"$0.49184","currency":"USD"},{"qty":1000,"price":"$0.39347","currency":"USD"},{"qty":2500,"price":"$0.35658","currency":"USD"},{"qty":5000,"price":"$0.34800","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/cc7d377b82ea56b486be0f1e072d9f7e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74LS157N/alternatives.json"},"ai":{"faq":[{"question":"Is SN74LS157N obsolete?","answer":"No, the SN74LS157N is listed as Active in the lifecycle status. TI continues to manufacture it, and there is no end-of-life notice or last-time-buy deadline in effect."},{"question":"What is the difference between 74LS157 and SN74LS157N?","answer":"The SN74LS157N is the specific TI part number for the 74LS157 function in a 16-pin DIP through-hole package. The base 74LS157 is the generic logic family function; the SN prefix indicates TI's standard logic prefix, and the N suffix designates the plastic DIP package. Other manufacturers may label their equivalent as DM74LS157N or MC74LS157N, but the function and pinout are identical across the 74LS family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS157N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS157N when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}