{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PCA9543AD,118","brand":"NXP Semiconductors","brandSlug":"nxp","productSlug":"PCA9543AD118","canonicalUrl":"https://icboms.com/nxp/PCA9543AD118","factsUrl":"https://icboms.com/api/mcp/products/PCA9543AD%2C118","rawCanonicalId":null},"summary":{"shortDescription":"NXP PCA9543AD,118, 2-Channel I²C Multiplexer, Interface I²C, SMBus, Voltage - Supply 2.3V ~ 5.5V, Surface Mount, 14-SOIC (0.154\", 3.90mm Width), Active.","salesMarkdown":"## What this part is and where it fits The NXP PCA9543AD,118 is a 2-channel I²C multiplexer designed to route I²C or SMBus traffic between a single upstream bus and two downstream channels. It lives in a 14-SOIC package (0.154\" body width, 3.90 mm) and operates from a 2.3 V to 5.5 V supply, which means it drops into both 3.3 V and 5 V logic systems without a level translator. ## Supply voltage and logic compatibility The 2.3 V to 5.5 V supply range covers the two most common I²C bus voltages. If you're running a 3.3 V bus, the PCA9543AD works without extra pull-up adjustments. At 5 V, it handles legacy 5 V-only peripherals. The I²C and SMBus interface support means it can be used with standard I²C controllers or SMBus hosts — just check the bus capacitance and pull-up resistor sizing for your channel count. ## Package and mounting The 14-SOIC package is a surface-mount footprint that's easy to hand-solder or reflow. The 0.154\" body width is the narrow SOIC variant, so verify your PCB land pattern matches the 3.90 mm width. Available in Tape & Reel (TR) or Cut Tape (CT) options — the Tape & Reel is the standard for automated pick-and-place, while Cut Tape suits prototype or small-batch builds. ## Lifecycle and sourcing The PCA9543AD,118 carries an active lifecycle status — no end-of-life notice, no last-time-buy window. It's ROHS3 compliant. For production quantities, the Tape & Reel option is the usual choice; for evaluation or repair, Cut Tape works.","metaTitle":"PCA9543AD,118 I²C Multiplexer, 2-Channel, 14-SOIC","metaDescription":"NXP PCA9543AD,118 2-channel I²C/SMBus multiplexer in 14-SOIC. Active lifecycle, 2.3V–5.5V supply.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Interface":"I²C, SMBus","Applications":"2-Channel I²C Multiplexer","Mounting Type":"Surface Mount","Package / Case":"14-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.3V ~ 5.5V","Supplier Device Package":"14-SO"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.11","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.11000","currency":"USD"},{"qty":10,"price":"$1.89500","currency":"USD"},{"qty":25,"price":"$1.78840","currency":"USD"},{"qty":100,"price":"$1.52360","currency":"USD"},{"qty":250,"price":"$1.43056","currency":"USD"},{"qty":500,"price":"$1.25174","currency":"USD"},{"qty":1000,"price":"$1.03716","currency":"USD"},{"qty":2500,"price":"$0.96563","currency":"USD"},{"qty":5000,"price":"$0.92987","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ec4f8b8ec2ddadffe7dbf368f13089e2.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does PCA9543AD work with 3.3V logic?","answer":"Yes. The supply voltage range of 2.3 V to 5.5 V includes 3.3 V, so the multiplexer operates correctly on a 3.3 V bus without additional level shifting."},{"question":"What is the difference between PCA9543AD and PCA9548A?","answer":"The PCA9543AD is a 2-channel I²C multiplexer, while the PCA9548A is an 8-channel variant. The PCA9548A comes in a larger package (24-pin TSSOP or SOIC) and requires more board area. For designs needing only two downstream channels, the PCA9543AD saves space and cost."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/nxp/PCA9543AD118","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/nxp/PCA9543AD118 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}}