{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PCA9542APW,118","brand":"NXP Semiconductors","brandSlug":"nxp","productSlug":"PCA9542APW~6118","canonicalUrl":"https://icboms.com/nxp/PCA9542APW~6118","factsUrl":"https://icboms.com/api/mcp/products/PCA9542APW%2C118","rawCanonicalId":null},"summary":{"shortDescription":"NXP PCA9542APW,118, 2-Channel I²C/SMBus Multiplexer, 2.3V to 5.5V supply, 14-TSSOP package, Surface Mount, Active lifecycle.","salesMarkdown":"The NXP PCA9542APW,118 is a 2-channel I²C and SMBus multiplexer that lets one master bus segment talk to two downstream buses with separate addresses. Packaged in a 14-TSSOP (4.40 mm width), it is a surface-mount part for mid-density boards where a smaller footprint than an SOIC matters. ROHS3 compliant. ## What the 2-channel mux means for the I²C bus Two channels means you can isolate two downstream buses from each other and from the upstream master. This solves the classic I²C address conflict — two devices with the same fixed address sit on separate channels, and the master talks to only one channel at a time. The SMBus compatibility also matters for power-management and battery-monitoring peripherals that use the SMBus protocol's timeout and alert lines.","metaTitle":"NXP PCA9542APW,118 I2C Multiplexer, 2.3V-5.5V, 14-TSSOP","metaDescription":"NXP PCA9542APW,118 2-channel I2C/SMBus multiplexer. Supply range 2.3V to 5.5V, 14-TSSOP package. Active lifecycle, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Interface":"I²C, SMBus","Applications":"2-Channel I²C Multiplexer","Mounting Type":"Surface Mount","Package / Case":"14-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.3V ~ 5.5V","Supplier Device Package":"14-TSSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.5","priceTiers":[{"qty":1,"price":"$2.50000","currency":"USD"},{"qty":10,"price":"$2.24900","currency":"USD"},{"qty":25,"price":"$2.12160","currency":"USD"},{"qty":100,"price":"$1.80750","currency":"USD"},{"qty":250,"price":"$1.69720","currency":"USD"},{"qty":500,"price":"$1.48506","currency":"USD"},{"qty":1000,"price":"$1.23047","currency":"USD"},{"qty":2500,"price":"$1.14561","currency":"USD"},{"qty":5000,"price":"$1.10318","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3195bab8286aa411221b8b3307e7d46a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/PCA9542APW%2C118/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between PCA9542A and PCA9542APW?","answer":"The PCA9542APW suffix indicates the 14-TSSOP package variant. The PCA9542A base part shares the same 2-channel I²C multiplexer function, but the package variant determines the footprint — the PW suffix is the TSSOP option. Pin-compatible across the same package code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/nxp/PCA9542APW~6118","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/nxp/PCA9542APW~6118 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}}