{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74HCT138E","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74HCT138E","canonicalUrl":"https://icboms.com/texas-instruments/CD74HCT138E","factsUrl":"https://icboms.com/api/mcp/products/CD74HCT138E","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments CD74HCT138E, 74HCT series Decoder/Demultiplexer, 1 x 3:8 circuit, 4.5V~5.5V supply, -55°C to 125°C, 16-DIP through-hole, 4mA output high/low.","salesMarkdown":"## What the CD74HCT138E is and where it fits The CD74HCT138E is a 74HCT-series 3-to-8 line decoder/demultiplexer. It takes a 3-bit binary input and selects one of eight active-low outputs. With a military temperature range of -55°C to 125°C, this part is rated for extended-environment deployments: avionics bay, outdoor telecom cabinets, engine-adjacent control modules, or downhole instrumentation where commercial-grade logic won't survive. The 16-pin DIP package (0.300\" body) is a through-hole legacy footprint still common in repair depots, breadboard prototyping, and low-volume industrial controllers that avoid SMT rework. ## Lifecycle and sourcing reality The CD74HCT138E carries an Active product status with ROHS3 compliance. This is a mature, stable line. ## Package and handling note Supplied in a 16-pin PDIP, shipped in tubes. Through-hole means no bake before reflow — just standard ESD handling. The 0.300\" row spacing fits common prototype boards and sockets. No MSL rating applies to DIP packages; they are inherently moisture-resistant.","metaTitle":"CD74HCT138E 74HCT Decoder/Demultiplexer, 1x3:8, -55°C~125°C","metaDescription":"CD74HCT138E 74HCT 3-to-8 line decoder/demultiplexer. Active production, -55°C to 125°C range, 4.5V~5.5V supply, 16-DIP through-hole.","metaKeywords":null},"attributes":{"series":"74HCT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Decoder/Demultiplexer","Series":"74HCT","Circuit":"1 x 3:8","Package":"Tube","Mounting Type":"Through Hole","Package / Case":"16-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5V ~ 5.5V","Independent Circuits":"1","Operating Temperature":"-55°C ~ 125°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"16-PDIP","Current - Output High, Low":"4mA, 4mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.87","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.87000","currency":"USD"},{"qty":10,"price":"$0.77000","currency":"USD"},{"qty":25,"price":"$0.72320","currency":"USD"},{"qty":100,"price":"$0.59030","currency":"USD"},{"qty":250,"price":"$0.54828","currency":"USD"},{"qty":500,"price":"$0.46662","currency":"USD"},{"qty":1000,"price":"$0.37330","currency":"USD"},{"qty":2500,"price":"$0.33830","currency":"USD"},{"qty":5000,"price":"$0.31497","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2fc5201369129d29f1b31cc529b87c5a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CD74HCT138E equivalent to SN74HCT138N?","answer":"Both are 74HCT 3-to-8 decoders in 16-pin DIP with similar specs. The CD74HCT138E is a Texas Instruments part; the SN74HCT138N is also TI. Functionally interchangeable in most designs — verify the exact supply and timing margins for your bus."},{"question":"What is the difference between CD74HCT138E and SN74HCT138N?","answer":"Both are functionally identical 3-to-8 decoders from TI in the same package. The difference is the ordering code suffix — CD74HCT138E vs SN74HCT138N — which may reflect different date codes or factory origins. No parametric difference in the datasheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74HCT138E","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74HCT138E when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T10:39:33.080Z","lastPublished":"2026-07-16T10:39:33.080Z","indexable":true}}