{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HC646DWR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HC646DWR","canonicalUrl":"https://icboms.com/texas-instruments/SN74HC646DWR","factsUrl":"https://icboms.com/api/mcp/products/SN74HC646DWR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series SN74HC646DWR, 8-bit transceiver, non-inverting, 3-state outputs, 2V to 6V supply, 7.8mA output current, -40°C to 85°C, 24-SOIC package.","salesMarkdown":"## 7.8 mA output drive — fan-out and load budget Each output sinks or sources 7.8 mA, enough to drive a handful of HC-family inputs or a single TTL load, but not enough for a heavily loaded backplane or a bank of LEDs without a buffer. For bus-oriented designs, the 3-state outputs let multiple devices share the same data lines without contention, as long as the enable timing is managed. The 24-SOIC (7.50 mm width) footprint is a standard body size, so board layout is straightforward and second-sourcing to another 74HC 24-SOIC transceiver is possible if supply tightens.","metaTitle":"SN74HC646DWR 74HC Transceiver, Non-Inverting, 3-State, 2V-6V","metaDescription":"Texas Instruments SN74HC646DWR 74HC series 8-bit transceiver, non-inverting, 3-state outputs. 2V to 6V supply, -40°C to 85°C, 24-SOIC. Active, ROHS3 compliant.","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":"Transceiver, Non-Inverting","Output Type":"3-State","Mounting Type":"Surface Mount","Package / Case":"24-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 6V","Number of Elements":"1","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"24-SOIC","Current - Output High, Low":"7.8mA, 7.8mA","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.68","priceTiers":[{"qty":1,"price":"$1.68000","currency":"USD"},{"qty":10,"price":"$1.49800","currency":"USD"},{"qty":25,"price":"$1.42160","currency":"USD"},{"qty":100,"price":"$1.16780","currency":"USD"},{"qty":250,"price":"$1.09164","currency":"USD"},{"qty":500,"price":"$0.96470","currency":"USD"},{"qty":1000,"price":"$0.76161","currency":"USD"},{"qty":2000,"price":"$0.71850","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/30dd1a8f208ee7752b4f332c01c30f91.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74HC646DWR/alternatives.json"},"ai":{"faq":[{"question":"Is SN74HC646DWR RoHS compliant?","answer":"Yes, the SN74HC646DWR is ROHS3 compliant, meaning it meets the RoHS directive's substance restrictions including lead, mercury, and cadmium."},{"question":"How does SN74HC646DWR compare to SN74HC245?","answer":"Both are 8-bit transceivers from the 74HC family with 3-state outputs and the same 2V to 6V supply range. The SN74HC646DWR includes a storage register on each port (D-type flip-flops with enable), so it can latch data independently of the bus state, whereas the SN74HC245 is a simple transparent transceiver without registers. Choose the SN74HC646DWR when you need to hold data through bus turnover or pipeline a transfer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HC646DWR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HC646DWR 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}}