{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"74S158PC","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"74S158PC","canonicalUrl":"https://icboms.com/texas-instruments/74S158PC","factsUrl":"https://icboms.com/api/mcp/products/74S158PC","rawCanonicalId":null},"summary":{"shortDescription":"74S158PC, Fairchild Semiconductor, TTL multiplexer, 4-function 2-line input, through-hole DIP, Active lifecycle, RoHS non-compliant.","salesMarkdown":"The 74S158PC is a TTL multiplexer from Fairchild Semiconductor that selects one of two data lines per function, with four independent multiplexer functions on a single chip. It is a through-hole device, typically in a DIP package, designed for legacy TTL logic systems where board-level signal routing or data selection is needed. The 74S158PC is listed as RoHS non-compliant. This is a sourcing constraint for any new build requiring RoHS conformance, particularly for EU-market products or assemblies that must pass restricted-substance testing. For legacy repair, retrofit, or military/aerospace applications where RoHS exemption applies, this part remains a valid choice. Verify your project's compliance requirements before committing the BOM line. ## Lifecycle and supply posture Because it is a legacy TTL part with RoHS non-compliance, availability may be tighter than for modern lead-free equivalents.","metaTitle":"74S158PC TTL Multiplexer, 4-Function 2-Line Input, Active","metaDescription":"74S158PC is a 4-function, 2-line-input TTL multiplexer in through-hole DIP. Active lifecycle, RoHS non-compliant.","metaKeywords":null},"attributes":{"series":"*","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"*","Package":"Bulk","lifecycle_stage":"eol_hot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.28","stockQuantity":0,"priceTiers":[{"qty":1069,"price":"$0.28000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ddd0fa20946851d9971f8571792c2b39.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the function of the 74S158 multiplexer?","answer":"The 74S158 is a TTL multiplexer with four independent functions, each selecting between two input lines. It performs data selection or signal routing in digital logic circuits."},{"question":"What is the difference between 74S158PC and 74LS158?","answer":"The 74S158 uses Schottky TTL logic (higher speed, higher power consumption), while the 74LS158 uses Low-Power Schottky TTL (lower speed, lower power). Both are 4-function 2-line-input multiplexers with the same pinout and function, but the S-series is faster and draws more supply current. The 74S158PC is through-hole; the 74LS158 is also through-hole but in the LS family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/74S158PC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/74S158PC 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}}