{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74HC27E","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74HC27E","canonicalUrl":"https://icboms.com/texas-instruments/CD74HC27E","factsUrl":"https://icboms.com/api/mcp/products/CD74HC27E","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series, CD74HC27E, triple 3-input NOR gate, through-hole 14-DIP (0.300\", 7.62mm), 2V to 6V supply, -55°C to 125°C, 2 µA quiescent, 16ns propagation delay at 6V/50pF.","salesMarkdown":"## Triple 3-Input NOR Gate in a Through-Hole DIP-14 The Texas Instruments CD74HC27E is a triple 3-input NOR gate from the 74HC high-speed CMOS logic family, housed in a 14-pin through-hole DIP (0.300\", 7.62mm) package. The three independent NOR gates each accept three inputs, and the device draws a maximum quiescent current of 2 µA, which keeps the power rail budget lean in battery-backed or always-on subsystems. The maximum propagation delay is 16 ns at 6V with a 50 pF load. At 2V the delay will be longer, but the 74HC family's CMOS outputs swing rail-to-rail, so noise margin is preserved even at lower supply voltages. If your board has a mixed 5V/3.3V logic environment, the 2V to 6V supply range lets this gate operate as a level translator: run the CD74HC27E from the receiving side's supply and the inputs tolerate the full 6V range. ## Lifecycle and Compliance — Active Production, ROHS3 For new designs or legacy BOM maintenance, the through-hole DIP-14 package means it remains a straightforward pick-and-place or hand-solder item, and the 74HC family's broad second-source ecosystem provides supply resilience. ## Package Fit — Through-Hole DIP-14 for Socketed or Wave-Solder Boards The 14-DIP (0.300\", 7.62mm) body with 2.54 mm pin pitch is a standard footprint that fits existing sockets, protoboard layouts, and wave-solder processes. The supplier device package is 14-PDIP. If your assembly line has moved exclusively to SMT, the same logic function is available in SOIC-14 and TSSOP-14 packages under different order codes within the 74HC family — but for a through-hole requirement this is the direct fit.","metaTitle":"CD74HC27E NOR Gate, 74HC, Triple 3-Input, DIP-14","metaDescription":"CD74HC27E triple 3-input NOR gate from the 74HC series. Through-hole DIP-14, 2V to 6V supply, 2 µA quiescent, 5.2 mA output, -55°C to 125°C.","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":"Through Hole","Package / Case":"14-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Number of Inputs":"3","Voltage - Supply":"2V ~ 6V","Number of Circuits":"3","Operating Temperature":"-55°C ~ 125°C","Input Logic Level - Low":"0.5V ~ 1.8V","Supplier Device Package":"14-PDIP","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":"16ns @ 6V, 50pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.69","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.69000","currency":"USD"},{"qty":10,"price":"$0.60900","currency":"USD"},{"qty":25,"price":"$0.57160","currency":"USD"},{"qty":100,"price":"$0.46660","currency":"USD"},{"qty":250,"price":"$0.43344","currency":"USD"},{"qty":500,"price":"$0.36888","currency":"USD"},{"qty":1000,"price":"$0.29510","currency":"USD"},{"qty":2500,"price":"$0.26744","currency":"USD"},{"qty":5000,"price":"$0.26100","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/bdc4a132ed81428edaf2233a70d4a72d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between CD74HC27E and CD74HCT27E?","answer":"The CD74HC27E is a 74HC-series device with CMOS-level input thresholds (0.5V to 1.8V low, 1.5V to 4.2V high at 2V to 6V supply). The CD74HCT27E is a 74HCT-series part with TTL-compatible input thresholds, designed to interface directly with 5V TTL logic. If your upstream logic is 5V TTL, the HCT variant avoids the need for external level shifting; if you are running at 3.3V or need the full 2V to 6V supply range, the HC variant is the correct choice."},{"question":"Can I use CD74HC27E as a replacement for 74HC27?","answer":"Yes, the CD74HC27E is a Texas Instruments implementation of the standard 74HC27 triple 3-input NOR gate. It is pin-compatible and functionally identical to any other manufacturer's 74HC27 in a DIP-14 package."},{"question":"What is the closest functional second-source for CD74HC27E?","answer":"The SN74HC21N is a dual 4-input AND gate from the same 74HC family in a DIP-14 package, but it is a different logic function (AND vs NOR) and has only two gates instead of three. For a direct functional replacement of a triple 3-input NOR gate, look for any manufacturer's 74HC27 in DIP-14 — such as the NXP 74HC27N or the ON Semiconductor MC74HC27ANG. The CD74HC27E itself is the TI-branded standard part."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74HC27E","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74HC27E 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}}