{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HC166D","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HC166D","canonicalUrl":"https://icboms.com/texas-instruments/SN74HC166D","factsUrl":"https://icboms.com/api/mcp/products/SN74HC166D","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series SN74HC166D, 8-bit parallel or serial to serial shift register, push-pull output, 2V to 6V supply, -40°C to 85°C, 16-SOIC surface mount.","salesMarkdown":"It accepts data either through eight parallel inputs (D0–D7) or a serial input, and shifts it out serially on the QH pin under control of a clock and shift/load signal. The push-pull output drives standard CMOS or TTL loads directly. Typical applications include expanding digital inputs on a microcontroller — reading a bank of switches or sensors over a single serial line — or converting parallel data from an older bus into a serial stream for a UART or SPI port. The wide supply range (2V to 6V) lets it interface with 3.3V or 5V logic without level translation. Rated for 2V to 6V supply, the SN74HC166D runs from a single 3.3V or 5V rail with no extra regulator. If your panel or motor drive sees -20°C startup or 70°C inside the enclosure, this part stays within spec. The 74HC family's typical propagation delay at 5V is around 20 ns, which is fast enough for clock rates up to several tens of MHz; for higher speed, the 74HCT or 74AC variants would be the next step up. ## Active lifecycle — no end-of-life concern for production BOMs","metaTitle":"SN74HC166D Shift Register, 8-bit, 16-SOIC, 2V-6V","metaDescription":"Texas Instruments SN74HC166D 8-bit parallel/serial to serial shift register in 16-SOIC. 2V to 6V supply, -40°C to 85°C, ROHS3 compliant. Active lifecycle.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"74HC","Package":"Tube","Function":"Parallel or Serial to Serial","Logic Type":"Shift Register","Output Type":"Push-Pull","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 6V","Number of Elements":"1","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"16-SOIC","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.97","priceTiers":[{"qty":1,"price":"$0.97000","currency":"USD"},{"qty":10,"price":"$0.85700","currency":"USD"},{"qty":25,"price":"$0.80520","currency":"USD"},{"qty":100,"price":"$0.65710","currency":"USD"},{"qty":250,"price":"$0.61032","currency":"USD"},{"qty":500,"price":"$0.51942","currency":"USD"},{"qty":1000,"price":"$0.41554","currency":"USD"},{"qty":2500,"price":"$0.37658","currency":"USD"},{"qty":5000,"price":"$0.36752","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1556c2aaadb487aa6629017e6b081682.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74HC166D/alternatives.json"},"ai":{"faq":[{"question":"Is SN74HC166D RoHS compliant?","answer":"Yes, it is ROHS3 compliant, meeting current EU and global environmental requirements."},{"question":"What is the function of SN74HC166D?","answer":"The SN74HC166D is an 8-bit parallel or serial to serial shift register with push-pull output. It shifts data in on eight parallel inputs or a serial input, and outputs it serially."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HC166D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HC166D 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}}