{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HC27D","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HC27D","canonicalUrl":"https://icboms.com/texas-instruments/SN74HC27D","factsUrl":"https://icboms.com/api/mcp/products/SN74HC27D","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series NOR Gate, SN74HC27D, 3 circuits, 3 inputs, 14-SOIC surface mount, 2V to 6V supply, -40°C to 85°C, tube packaging.","salesMarkdown":"## Triple NOR gate for general-purpose logic The SN74HC27D is a triple 3-input NOR gate from the 74HC family, providing three independent NOR functions in a single 14-SOIC package. It operates across a 2V to 6V supply range, making it suitable for battery-powered and 5V logic systems alike. Each of the three gates accepts three inputs and delivers a standard push-pull output capable of sourcing or sinking 5.2 mA — enough to drive a following gate input or a low-current LED indicator without a buffer. ## Speed and power budget at a glance At lower supply voltages the delay increases, so the 15 ns figure is the best-case; for 3.3 V operation expect roughly 20–25 ns. Quiescent current is just 2 µA maximum, so the gate adds negligible standing power in a mixed-signal board where the logic section is idle most of the time. Input logic thresholds track the supply: low-level is 0.5 V to 1.8 V, high-level is 1.5 V to 4.2 V (at Vcc=6 V). This means the gate interprets a 3.3 V CMOS output as a valid high without a level translator. Supplied in a tube (bulk), this is the standard pick-and-place format for low-volume assembly or rework. It remains a standard catalog item for new designs and replacement builds. The 74HC family is a mature, widely second-sourced logic series.","metaTitle":"SN74HC27D TI 74HC NOR Gate, 3-ch 3-inp, 14-SOIC, Active","metaDescription":"Texas Instruments SN74HC27D triple 3-input NOR gate, 2V–6V supply, 15ns propagation delay at 6V, 50pF. Active, RoHS3 compliant. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"74HC","Package":"Tube","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":"$1.03600","currency":"USD"},{"qty":25,"price":"$0.98320","currency":"USD"},{"qty":100,"price":"$0.80780","currency":"USD"},{"qty":250,"price":"$0.75512","currency":"USD"},{"qty":500,"price":"$0.66730","currency":"USD"},{"qty":1000,"price":"$0.52681","currency":"USD"},{"qty":2500,"price":"$0.49700","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1be9822d9f3075345d604afaf90885b2.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Will SN74HC27D drop into a board laid out for SN74HC27APWR?","answer":"The pinout is identical, but the SOIC body is narrower — the TSSOP pads are wider, so the SOIC part will fit the TSSOP land pattern, but the reverse may leave exposed pads. Check the PCB footprint before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HC27D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HC27D 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}}