{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74ABT640DW","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74ABT640DW","canonicalUrl":"https://icboms.com/texas-instruments/SN74ABT640DW","factsUrl":"https://icboms.com/api/mcp/products/SN74ABT640DW","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74ABT series SN74ABT640DW, 8-bit inverting bus transceiver with 3-state outputs, 4.5V–5.5V supply, 32mA source / 64mA sink, -40°C to 85°C, 20-SOIC package.","salesMarkdown":"## What this 74ABT640 inverting transceiver is for It uses 3-state outputs so you can connect it directly to a shared backplane or memory bus without contention. ## 32 mA source, 64 mA sink — what that drive buys you The output drive is rated at 32 mA for the high level and 64 mA for the low level. That sink current is double the source, which matches the typical bus load where the low-level fan-out is the tighter constraint. If you're driving a heavily loaded 5V backplane or a long ribbon cable, this part can handle the current without needing a separate buffer. The 3-state outputs let you float the bus when the transceiver is not selected, which is how you wire up multiple cards on the same data lines. That means Texas Instruments is still manufacturing it, and there's no last-time-buy window closing. For a repair bench or a production BOM that needs this exact inverting transceiver, you're not forced into the surplus channel yet. The 74ABT series has been around for years, so date codes may vary, but the part is still a standard catalog item. ## Industrial temperature range — not just an office part If your system lives in a conditioned server room, the commercial-grade 74ABT parts would also work, but the industrial rating gives you margin.","metaTitle":"SN74ABT640DW 74ABT Inverting Transceiver, 20-SOIC, 32/64mA","metaDescription":"SN74ABT640DW is a Texas Instruments 74ABT 8-bit inverting bus transceiver with 3-state outputs. 4.5V–5.5V supply, 32mA source / 64mA sink drive.","metaKeywords":null},"attributes":{"series":"74ABT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"74ABT","Package":"Tube","Logic Type":"Transceiver, Inverting","Output Type":"3-State","Mounting Type":"Surface Mount","Package / Case":"20-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5V ~ 5.5V","Number of Elements":"1","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"20-SOIC","Current - Output High, Low":"32mA, 64mA","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.45","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.45000","currency":"USD"},{"qty":10,"price":"$2.20500","currency":"USD"},{"qty":25,"price":"$2.08040","currency":"USD"},{"qty":100,"price":"$1.77240","currency":"USD"},{"qty":250,"price":"$1.66420","currency":"USD"},{"qty":500,"price":"$1.45618","currency":"USD"},{"qty":1000,"price":"$1.20654","currency":"USD"},{"qty":2500,"price":"$1.17750","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0457d3628aad0c46d4ba344c2f62daa9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between SN74ABT640DW and SN74ABT2245DW?","answer":"The SN74ABT2245DW is a non-inverting transceiver; the SN74ABT640DW is inverting. Both are 8-bit, 3-state, 20-SOIC, and share the same supply range and drive strength. If your bus needs the data polarity preserved, the 2245 is the right call. If you need inversion, the 640 is the part. They are not pin-compatible substitutes — the logic function differs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74ABT640DW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74ABT640DW 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}}