{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HC27DT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HC27DT","canonicalUrl":"https://icboms.com/texas-instruments/SN74HC27DT","factsUrl":"https://icboms.com/api/mcp/products/SN74HC27DT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series SN74HC27DT, triple 3-input NOR gate, 14-SOIC (0.154\", 3.90 mm width), 2 V to 6 V supply, -40°C to 85°C, 15 ns max propagation delay at 6 V, 50 pF.","salesMarkdown":"## Triple 3-input NOR gate in 14-SOIC — 74HC logic family The SN74HC27DT from Texas Instruments is a triple 3-input NOR gate in the 74HC CMOS logic family. It integrates three independent NOR gates, each with three inputs, in a compact 14-SOIC surface-mount package. The 2 V to 6 V supply range makes it compatible with 3.3 V and 5 V logic rails, and the -40°C to 85°C operating temperature covers industrial environments. Quiescent current maxes at 2 µA, suiting battery-powered or always-on glue logic. ## 15 ns propagation delay — timing margin for the logic path At 6 V supply and 50 pF load, the maximum propagation delay is 15 ns. For a 5 V rail, the delay will be slightly higher — budget around 20 ns typical. This is fast enough for most board-level decode, enable, and gating functions running below 20 MHz. If your clock or data path needs tighter than 10 ns, step to the 74LVC or 74AUC families. The 5.2 mA output drive (both high and low) is adequate for driving a few CMOS inputs or a single LED; it won't drive a relay coil or a long backplane trace. ## Active and ROHS3 compliant — no LTB risk There is no last-time-buy notice or obsolescence risk on this line. For procurement, this means the part can be specified into new designs with confidence that the factory will support it for the foreseeable future. The 14-SOIC package is a standard footprint shared by many 74HC and 74HCT devices, so alternate sourcing from other manufacturers (NXP, ON Semiconductor) is straightforward if a second source is needed.","metaTitle":"SN74HC27DT NOR Gate, 3-CH 3-Inp, 14-SOIC, 74HC Series","metaDescription":"TI SN74HC27DT triple 3-input NOR gate, 2V–6V supply, 15ns delay at 6V/50pF, -40°C to 85°C, 14-SOIC. Active production, ROHS3.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"74HC","Package":"Tape & Reel (TR); Cut Tape (CT)","Logic Type":"NOR Gate","Mounting Type":"Surface Mount","Package / Case":"14-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Number of Inputs":"3","Voltage - Supply":"2V ~ 6V","Number of Circuits":"3","Operating Temperature":"-40°C ~ 85°C","Input Logic Level - Low":"0.5V ~ 1.8V","Supplier Device Package":"14-SOIC","Input Logic Level - High":"1.5V ~ 4.2V","Current - Quiescent (Max)":"2 µA","Current - Output High, Low":"5.2mA, 5.2mA","Max Propagation Delay @ V, Max CL":"15ns @ 6V, 50pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.16","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.16000","currency":"USD"},{"qty":10,"price":"$1.03500","currency":"USD"},{"qty":25,"price":"$0.98240","currency":"USD"},{"qty":100,"price":"$0.80700","currency":"USD"},{"qty":250,"price":"$0.75436","currency":"USD"},{"qty":500,"price":"$0.66664","currency":"USD"},{"qty":1250,"price":"$0.52629","currency":"USD"},{"qty":2500,"price":"$0.49650","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1be9822d9f3075345d604afaf90885b2.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between SN74HC27DT and SN74HC27D?","answer":"The difference is the packaging and reel format. SN74HC27DT is supplied in Tape & Reel (TR) and Cut Tape (CT) options, while SN74HC27D typically comes in tubes or other packaging. The silicon, logic function, and pinout are identical. Both are triple 3-input NOR gates in 14-SOIC, with the same 2 V to 6 V supply range and -40°C to 85°C temperature grade."},{"question":"Is SN74HC27DT compatible with 3.3V logic?","answer":"Yes, the 2 V to 6 V supply range includes 3.3 V. At 3.3 V, the input logic low threshold is 0.5 V to 1.8 V, and the high threshold is 1.5 V to 4.2 V. A 3.3 V CMOS output driving a 3.3 V rail will meet the high-level input requirement. Propagation delay will be slightly longer than the 15 ns at 6 V — expect about 25 ns at 3.3 V and 50 pF."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HC27DT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HC27DT 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}}