{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74AC240E","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74AC240E","canonicalUrl":"https://icboms.com/texas-instruments/CD74AC240E","factsUrl":"https://icboms.com/api/mcp/products/CD74AC240E","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74AC series, Buffer, Inverting, 3-State output, 24mA / 24mA, 1.5V ~ 5.5V supply, -40°C ~ 85°C, Through Hole 20-DIP (0.300\", 7.62mm), 20-PDIP.","salesMarkdown":"The CD74AC240E is a dual 4-bit inverting buffer with 3-state outputs from TI's 74AC family. It takes two independent 4-bit sections, each with its own output-enable control, and drives 24 mA per output on both the high and low side. The 20-pin DIP package (0.300\" body) is through-hole, so it fits standard sockets and is straightforward to hand-rework. For a through-hole 74AC buffer that has been around for years, this is a solid sourcing signal – no need to stockpile or scramble for a replacement. ## Package and mounting The 24 mA symmetric drive is typical for the 74AC family and enough to drive a handful of CMOS inputs, a small bus, or a low-current LED directly. The 3-state outputs let you share a data bus with other devices – just mind the output-enable timing if you are hot-swapping.","metaTitle":"CD74AC240E 74AC Buffer, Inverting, 24mA, 20-DIP – Active","metaDescription":"CD74AC240E 74AC dual 4-bit inverting buffer with 3-state outputs, 24mA drive, 1.5V–5.5V supply, -40°C to 85°C, 20-DIP.","metaKeywords":null},"attributes":{"series":"74AC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"74AC","Package":"Tube","Logic Type":"Buffer, Inverting","Output Type":"3-State","Mounting Type":"Through Hole","Package / Case":"20-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"1.5V ~ 5.5V","Number of Elements":"2","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"20-PDIP","Current - Output High, Low":"24mA, 24mA","Number of Bits per Element":"4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.98","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.98000","currency":"USD"},{"qty":10,"price":"$0.87900","currency":"USD"},{"qty":25,"price":"$0.83400","currency":"USD"},{"qty":100,"price":"$0.68510","currency":"USD"},{"qty":250,"price":"$0.64040","currency":"USD"},{"qty":500,"price":"$0.56594","currency":"USD"},{"qty":1000,"price":"$0.44679","currency":"USD"},{"qty":2500,"price":"$0.42150","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/38efa430ec0a62c615f7ad17ab205ec5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between CD74AC240E and CD74AC244E?","answer":"Both are 74AC buffers in 20-pin DIP, but the CD74AC240E is an inverting buffer while the CD74AC244E is non-inverting. The pinout differs on the output-enable and data pins, so they are not drop-in replacements – check the logic polarity against your bus design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74AC240E","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74AC240E 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}}