{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74ABT543ADB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74ABT543ADB","canonicalUrl":"https://icboms.com/texas-instruments/SN74ABT543ADB","factsUrl":"https://icboms.com/api/mcp/products/SN74ABT543ADB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74ABT series SN74ABT543ADB registered bus transceiver, non-inverting, 3-state outputs, 8-bit, 32 mA / 64 mA output drive, 4.5 V to 5.5 V supply, -40°C to 85°C, 24-SSOP package.","salesMarkdown":"## Registered bus transceiver for 5 V backplane and memory buses The single-element, 8-bit configuration keeps the pinout clean for byte-wide paths. ## 32 mA source, 64 mA sink — drive strength for loaded lines Output drive is rated at 32 mA source and 64 mA sink per channel — that is enough to drive a heavily loaded backplane or a bank of memory chips without external buffers. The asymmetric sink/source ratio is typical for 5 V ABT logic, where the low-side pull-down is stronger to handle capacitive discharge on falling edges. If your bus has more than about 15-20 pF per line or runs longer than a few inches, this part saves you from adding a separate line driver. If your board has a 3.3 V core rail, you will need a separate regulator or a level shifter for the bus side. ## 24-SSOP footprint and surface-mount assembly Housed in a 24-SSOP package with 0.209-inch body width and 5.30 mm pitch, this is a compact surface-mount part suitable for dense PCBs. The supplier device package is 24-SSOP — no exposed pad, so standard reflow profiles for SSOP work fine.","metaTitle":"SN74ABT543ADB 74ABT Registered Bus Transceiver, 32/64 mA","metaDescription":"Texas Instruments SN74ABT543ADB 74ABT registered bus transceiver, non-inverting, 3-state outputs, 32/64 mA drive, 4.5-5.5 V supply, -40 to 85°C, 24-SSOP.","metaKeywords":null},"attributes":{"series":"74ABT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"74ABT","Package":"Bulk","Logic Type":"Transceiver, Non-Inverting","Output Type":"3-State","Mounting Type":"Surface Mount","Package / Case":"24-SSOP (0.209\\\", 5.30mm 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":"24-SSOP","Current - Output High, Low":"32mA, 64mA","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.55","stockQuantity":0,"priceTiers":[{"qty":545,"price":"$0.55000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6b6e3962ebb3edb194c9784e34d97857.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional equivalent to SN74ABT543ADB?","answer":"The SN74ABT2245DW is a non-inverting transceiver in the same 74ABT family with similar 32 mA output drive and 8-bit width, but it is a non-registered (flow-through) transceiver — it lacks the internal registers for pipelined operation. If you need registered bus operation, the SN74ABT543ADB is the correct part; the 2245 is a simpler alternative for unbuffered bidirectional paths."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74ABT543ADB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74ABT543ADB 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}}