{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HC540N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HC540N","canonicalUrl":"https://icboms.com/texas-instruments/SN74HC540N","factsUrl":"https://icboms.com/api/mcp/products/SN74HC540N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series, Buffer, Inverting, 1-Element, 8-Bit per Element, 3-State Output, 2V to 6V Supply, Through Hole, 20-DIP (0.300\", 7.62mm), -40°C to 85°C.","salesMarkdown":"## Eight-bit inverting line driver with 3-state control The Texas Instruments SN74HC540N is an 8-bit inverting buffer with 3-state outputs, built on the 74HC logic family. It takes eight input signals and delivers the inverted logic levels to the outputs, with a common output-enable (OE) pin that puts all outputs into a high-impedance state when pulled high. This makes it a straightforward choice for driving a data bus where the bus direction is fixed but bus contention must be avoided — typical in memory-interface, address-latch, or general-purpose line-driver roles on a 5V or 3.3V backplane. The wide supply range from 2V to 6V covers both TTL-compatible 5V rails and lower-voltage logic systems, and the industrial temperature range (-40°C to 85°C) suits factory-floor control cabinets, outdoor telecom gear, and similar environments where the board sees ambient swings. ## What the 7.8 mA output drive means for your bus The SN74HC540N sources and sinks 7.8 mA per output at 5V. That is enough to drive one or two standard 74HC or 74HCT inputs, or a low-power LED indicator.","metaTitle":"SN74HC540N 74HC Inverting Buffer, 3-State, 20-DIP, Active","metaDescription":"TI SN74HC540N 8-bit inverting buffer with 3-state outputs, 2V-6V supply, -40°C to 85°C, 20-DIP. Active lifecycle, available to order.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Series":"74HC","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":"2V ~ 6V","Number of Elements":"1","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"20-PDIP","Current - Output High, Low":"7.8mA, 7.8mA","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.85","priceTiers":[{"qty":1,"price":"$0.85000","currency":"USD"},{"qty":10,"price":"$0.74500","currency":"USD"},{"qty":25,"price":"$0.70000","currency":"USD"},{"qty":100,"price":"$0.57120","currency":"USD"},{"qty":250,"price":"$0.53060","currency":"USD"},{"qty":500,"price":"$0.45156","currency":"USD"},{"qty":1000,"price":"$0.36125","currency":"USD"},{"qty":2500,"price":"$0.32738","currency":"USD"},{"qty":5000,"price":"$0.31950","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/cf2b1a640baf321fb0aee1e284a2c5f3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74HC540N/alternatives.json"},"ai":{"faq":[{"question":"Can SN74HC540N be used as a non-inverting buffer?","answer":"No, the SN74HC540N is an inverting buffer — the output is the logical inverse of the input. For a non-inverting buffer with the same pinout, use the SN74HC541 (which is the non-inverting sibling in the same 74HC family)."},{"question":"What is the difference between SN74HC540 and SN74HC541?","answer":"The SN74HC540 is an inverting buffer; the SN74HC541 is a non-inverting buffer. Both are 8-bit, 3-state, 20-pin DIP parts with the same pinout except for the inversion. Choose the SN74HC540 when you need inverted logic on the bus; choose the SN74HC541 when you need the signal polarity preserved."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HC540N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HC540N when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}