{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS645-1N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS645-1N","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS645-1N","factsUrl":"https://icboms.com/api/mcp/products/SN74LS645-1N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN74LS645-1N, series 74LS, logic type Transceiver Non-Inverting, output 3-State, 8-bit, 1 element, supply 4.75V~5.25V, output current 15mA/48mA, through hole 20-DIP (0.300\", 7.62mm), 20-PDIP, operating temperature 0°C~70°C, tube.","salesMarkdown":"## Output drive and bus loading The 15mA high-level and 48mA low-level output currents are typical for 74LS transceivers. The asymmetric sink-to-source ratio means the part can drive a heavier load when pulling a line low — useful for bus architectures where the low state is the active drive. The 3-state outputs allow multiple transceivers to share a common data bus without contention, controlled by the output-enable pins. Not specified for automotive or extended industrial use.","metaTitle":"SN74LS645-1N 74LS Transceiver, Non-Inverting, 3-State","metaDescription":"SN74LS645-1N is an active 8-bit 74LS bus transceiver in a 20-DIP package. 5V TTL compatible, 15mA/48mA output drive, 0-70°C. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Signal Isolation"],"specifications":{"Series":"74LS","Package":"Tube","Logic Type":"Transceiver, Non-Inverting","Output Type":"3-State","Mounting Type":"Through Hole","Package / Case":"20-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Number of Elements":"1","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"20-PDIP","Current - Output High, Low":"15mA, 48mA","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.74","priceTiers":[{"qty":1,"price":"$2.74000","currency":"USD"},{"qty":10,"price":"$2.46000","currency":"USD"},{"qty":25,"price":"$2.32040","currency":"USD"},{"qty":100,"price":"$1.97700","currency":"USD"},{"qty":250,"price":"$1.85640","currency":"USD"},{"qty":500,"price":"$1.62434","currency":"USD"},{"qty":1000,"price":"$1.34588","currency":"USD"},{"qty":2500,"price":"$1.25306","currency":"USD"},{"qty":5000,"price":"$1.20665","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/296d9486f6e297130953e9032e85d6b4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74LS645-1N/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between SN74LS645-1N and SN74LS245?","answer":"Both are 8-bit bus transceivers in the 74LS family, but the SN74LS645-1N is non-inverting while the SN74LS245 is inverting. The pinouts differ accordingly."},{"question":"Is SN74LS645-1N compatible with 5V TTL logic?","answer":"Yes, the 4.75V to 5.25V supply range and 15mA/48mA output drive make it directly compatible with standard 5V TTL logic families."},{"question":"What is the pinout diagram for SN74LS645-1N?","answer":"The pinout is standard for a 20-pin DIP transceiver with separate data ports (A and B), output-enable, and direction control. Refer to the manufacturer's datasheet for the exact pin assignments."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS645-1N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS645-1N 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}}