{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HC540PWT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HC540PWT","canonicalUrl":"https://icboms.com/texas-instruments/SN74HC540PWT","factsUrl":"https://icboms.com/api/mcp/products/SN74HC540PWT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series, SN74HC540PWT, Buffer, Inverting, 3-State, 2V ~ 6V supply, 1 element, 8 bits per element, 7.8mA output, -40°C ~ 85°C, 20-TSSOP package, Surface Mount.","salesMarkdown":"## What this 74HC inverting buffer does on your board It takes a logic input and outputs the inverted version, with the output bus able to be tri-stated via an output-enable control. This makes it a standard choice for bus isolation, signal inversion, or driving a shared data bus where multiple sources need to release the line. The 2V to 6V supply range is the headline compatibility feature. If your board runs a 3.3V microcontroller and a 5V peripheral, this buffer can sit on either rail and still switch correctly. The 7.8mA source and sink capability is typical for HC logic — enough to drive a few CMOS gate inputs or a low-power LED indicator, but not enough for a high-current relay or a long backplane trace without a line driver. For bus applications, the 3-state output lets multiple buffers share the same data lines; just make sure the output-enable logic is wired so only one buffer is active at a time. ## Package and footprint — 20-TSSOP The 20-TSSOP package (4.40mm body width) is a compact surface-mount footprint that fits on dense PCBs. It is a common package for 8-bit bus buffers, so the land pattern is well-documented. The part is also available in Cut Tape (CT) for prototyping, which is useful for small-batch builds.","metaTitle":"SN74HC540PWT 74HC Inverting Buffer, 3-State, 20-TSSOP","metaDescription":"Texas Instruments SN74HC540PWT 74HC inverting buffer with 3-state outputs, 2V-6V supply, -40°C to 85°C, 20-TSSOP. Active lifecycle, 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-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 6V","Number of Elements":"1","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"20-TSSOP","Current - Output High, Low":"7.8mA, 7.8mA","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.35","priceTiers":[{"qty":1,"price":"$1.35000","currency":"USD"},{"qty":10,"price":"$1.20400","currency":"USD"},{"qty":25,"price":"$1.14280","currency":"USD"},{"qty":100,"price":"$0.93860","currency":"USD"},{"qty":250,"price":"$0.87740","currency":"USD"},{"qty":500,"price":"$0.77540","currency":"USD"},{"qty":1250,"price":"$0.61215","currency":"USD"},{"qty":2500,"price":"$0.57750","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/cf2b1a640baf321fb0aee1e284a2c5f3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74HC540PWT/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HC540PWT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HC540PWT 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}}