{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HC240DBR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HC240DBR","canonicalUrl":"https://icboms.com/texas-instruments/SN74HC240DBR","factsUrl":"https://icboms.com/api/mcp/products/SN74HC240DBR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC SN74HC240DBR, Buffer, Inverting, 3-State, 2V ~ 6V, 7.8mA, -40°C ~ 85°C, 20-SSOP, Surface Mount.","salesMarkdown":"## What this octal inverting buffer does on your board It takes a logic-level input and outputs the inverted version, with each of the two elements handling four bits. The 3-state outputs let you disconnect the buffer from the bus by pulling the output-enable pins high — essential for shared data lines where multiple drivers need to take turns. Supply range of 2V to 6V means it works in both 3.3V and 5V systems without a level shifter, though the 7.8mA output drive is modest: fine for driving CMOS logic inputs or a few LED indicators, but not for relays or long cables directly. ## Supply voltage — 3.3V and 5V both work Rated 2V to 6V, the SN74HC240DBR runs happily on a 3.3V rail or a 5V rail. At 3.3V the propagation delay is a bit longer than at 5V, but for most bus-buffering and signal-inversion tasks the margin is fine. If your design lives at 1.8V, this part won't work — the 74HC family doesn't guarantee operation below 2V. For 1.8V logic, look at the 74LVC or 74AUC families instead. ## Package and footprint — 20-SSOP Housed in a 20-SSOP package (0.209\" body width, 5.30mm), the SN74HC240DBR is a surface-mount part with a 0.65mm pin pitch. ## Temperature grade — industrial, not automotive It is not qualified to AEC-Q100, so it is not the right choice for under-hood automotive or other high-temperature environments that push beyond 85°C. For those, you would need a 74HC part from the automotive-grade line (typically with a 'Q1' suffix). For a production BOM, this part is a low-risk choice — no imminent obsolescence to plan around.","metaTitle":"SN74HC240DBR 74HC Inverting Buffer, 3-State, 20-SSOP","metaDescription":"TI SN74HC240DBR octal inverting buffer with 3-state outputs. 2V–6V supply, 7.8mA drive, -40°C to 85°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"74HC","Package":"Tape & Reel (TR); Cut Tape (CT)","Logic Type":"Buffer, Inverting","Output Type":"3-State","Mounting Type":"Surface Mount","Package / Case":"20-SSOP (0.209\\\", 5.30mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 6V","Number of Elements":"2","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"20-SSOP","Current - Output High, Low":"7.8mA, 7.8mA","Number of Bits per Element":"4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.65","priceTiers":[{"qty":1,"price":"$0.65000","currency":"USD"},{"qty":10,"price":"$0.55300","currency":"USD"},{"qty":25,"price":"$0.51560","currency":"USD"},{"qty":100,"price":"$0.41260","currency":"USD"},{"qty":250,"price":"$0.38308","currency":"USD"},{"qty":500,"price":"$0.32414","currency":"USD"},{"qty":1000,"price":"$0.25048","currency":"USD"},{"qty":2000,"price":"$0.22838","currency":"USD"},{"qty":6000,"price":"$0.21364","currency":"USD"},{"qty":10000,"price":"$0.20850","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0dae3e5cc0ee3822560cb0e18ba9a8d5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74HC240DBR/alternatives.json"},"ai":{"faq":[{"question":"What is the function of SN74HC240DBR?","answer":"It is a dual 4-bit inverting buffer with 3-state outputs. It inverts the logic level on each input and drives the inverted signal onto the output bus when the output-enable pins are active. When the output-enable pins are inactive, the outputs go to a high-impedance state, effectively disconnecting the buffer from the bus."},{"question":"Can I use SN74HC240DBR in a 3.3V system?","answer":"Yes. The supply voltage range is 2V to 6V, so 3.3V is well within spec. Propagation delay will be slightly longer than at 5V, but for typical bus-buffering and signal-inversion tasks the timing margin is adequate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HC240DBR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HC240DBR 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}}