{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74AC573N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74AC573N","canonicalUrl":"https://icboms.com/texas-instruments/SN74AC573N","factsUrl":"https://icboms.com/api/mcp/products/SN74AC573N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN74AC573N, 74AC series, D-Type Transparent Latch, Octal (8:8), Tri-State outputs, Through Hole 20-DIP (0.300\", 7.62mm), 2V ~ 6V supply, 2.5ns propagation delay, 24mA output drive, -40°C ~ 85°C.","salesMarkdown":"## Octal transparent latch for high-speed bus isolation The Texas Instruments SN74AC573N is an octal D-type transparent latch with tri-state outputs in a 20-pin DIP package. When the latch-enable (LE) input is high, data at the D inputs flows through to the Q outputs; when LE goes low, the last data state is latched. The output-enable (OE) bar puts all eight outputs into high-impedance state for bus isolation, letting multiple devices share a data bus without contention. ## 2.5ns propagation delay — what it buys on the bus The 74FCT573APC is a functional peer with the same pinout and octal latch function, but its 8.5ns propagation delay is more than three times slower. For a drop-in upgrade that keeps the same 20-DIP footprint and tri-state bus architecture, the 74AC family is the faster, wider-temperature choice. ## Active lifecycle — no near-term obsolescence The SN74AC573N carries an Active product status, meaning TI continues to manufacture and support this part. This makes it suitable for both new designs and ongoing production BOMs without supply-risk planning for an LTB event. ROHS3 compliance is confirmed, so the part meets current EU and global restrictions on hazardous substances. No special handling or exemption paperwork is needed for European-market equipment. ## Through-hole 20-DIP — board fit and handling For prototyping or rework, the DIP package is socket-friendly — no hot-air or reflow station needed. In production, wave-solder or selective-solder processes handle the through-hole leads.","metaTitle":"SN74AC573N Octal D Latch, 2.5ns, 24mA, 20-DIP","metaDescription":"TI SN74AC573N octal D-type transparent latch with tri-state outputs. 2.5ns propagation delay, 24mA drive, 2-6V supply, -40 to 85°C. Active production.","metaKeywords":null},"attributes":{"series":"74AC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"74AC","Circuit":"8:8","Package":"Tube","Logic Type":"D-Type Transparent Latch","Output Type":"Tri-State","Mounting Type":"Through Hole","Package / Case":"20-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 6V","Independent Circuits":"1","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"20-PDIP","Delay Time - Propagation":"2.5ns","Current - Output High, Low":"24mA, 24mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.98","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.98000","currency":"USD"},{"qty":10,"price":"$0.87200","currency":"USD"},{"qty":25,"price":"$0.82800","currency":"USD"},{"qty":100,"price":"$0.68020","currency":"USD"},{"qty":250,"price":"$0.63584","currency":"USD"},{"qty":500,"price":"$0.56190","currency":"USD"},{"qty":1000,"price":"$0.44361","currency":"USD"},{"qty":2500,"price":"$0.41850","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/194100d5b29b4b11113d2a461f025df7.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between SN74AC573N and SN74HC573N?","answer":"The key difference is speed: the SN74AC573N has a 2.5ns propagation delay, while a typical 74HC573 runs 10-15ns. The 74AC family also offers higher output drive (24mA vs ~4mA for HC at 5V) and operates across the same 2V-6V supply range. Both are pin-compatible octal latches in 20-DIP, but the AC version is significantly faster and can drive more load."},{"question":"What is the equivalent replacement for SN74AC573N?","answer":"The 74FCT573APC is a functional equivalent with the same octal latch function and 20-DIP footprint, but it has a slower 8.5ns propagation delay and a commercial 0°C to 70°C temperature range only. For industrial-temperature designs (-40°C to 85°C), the SN74AC573N is the correct choice — the 74FCT573APC cannot substitute in that environment."},{"question":"What logic family is SN74AC573N compatible with?","answer":"The 74AC logic family is compatible with both 5V TTL and 3.3V CMOS logic levels. Input thresholds are TTL-compatible (VIL max 0.8V, VIH min 2V at 5V supply), so it can interface directly with 74LS, 74HCT, and 74FCT outputs. Outputs swing rail-to-rail, making it suitable for driving CMOS inputs on microcontrollers, FPGAs, or other 74AC/74ACT devices."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74AC573N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74AC573N when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}