{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"74FCT138ASO","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"74FCT138ASO","canonicalUrl":"https://icboms.com/renesas/74FCT138ASO","factsUrl":"https://icboms.com/api/mcp/products/74FCT138ASO","rawCanonicalId":null},"summary":{"shortDescription":"Renesas Electronics 74FCT138ASO 1-of-8 decoder/demultiplexer, 3:8 circuit, single supply 4.5-5.5V, SOIC-16 surface mount, -40 to +85°C.","salesMarkdown":"## 1-of-8 decoder with enable — 3:8 demultiplexer in SOIC-16 The 74FCT138ASO is a single 3:8 decoder/demultiplexer from Renesas, implementing a 1-of-8 output decode with an active-low enable input. It takes a three-bit binary address and asserts one of eight active-low outputs, making it a standard building block for memory-mapped I/O selection, chip-enable generation, and address decoding in 5V logic systems. The industrial temperature range spans -40°C to +85°C, covering factory-floor and outdoor telecom enclosures. ## Supply voltage, output drive, and temperature grade Rated for 4.5V to 5.5V single-supply operation, the 74FCT138ASO is a 5V-logic part that sits comfortably on a regulated 5V rail. The 15 mA high-level and 48 mA low-level output currents mean it can fan out to multiple CMOS or TTL loads without adding line drivers — useful when the decode output must enable several memory or peripheral chips simultaneously. In a control cabinet near a motor drive or a base-station radio head, the 85°C ceiling provides thermal margin above the 70°C commercial limit. The wide-body variant offers better thermal dissipation than the narrow SOIC for the same pin count — the extra copper area under the package helps sink heat from the output drivers when several channels are active. Surface-mount assembly with a standard reflow profile; no exposed pad or special thermal management required. The 1.27 mm pitch is readily inspectable and reworkable with basic hot-air tools. ## Lifecycle, compliance, and sourcing Sourced through independent distribution channels with full lot traceability.","metaTitle":"Renesas 74FCT138ASO 1-of-8 Decoder, 4.5-5.5V, SOIC-16","metaDescription":"Renesas 74FCT138ASO 1-of-8 decoder/demultiplexer, active production, 4.5-5.5V supply, 15mA/48mA output drive, -40 to +85°C, SOIC-16. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Type":"Decoder","Circuit":"1 x 3:8","Package":"Bulk","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5V ~ 5.5V","Independent Circuits":"1","Operating Temperature":"-40°C ~ 85°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"16-SOIC","Current - Output High, Low":"15mA, 48mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.27","stockQuantity":23,"priceTiers":[{"qty":1110,"price":"$0.27000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/aa72c9d68933da164f95ce7976b4c203.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/74FCT138ASO","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/74FCT138ASO when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}