{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PCA9641PWJ","brand":"NXP Semiconductors","brandSlug":"nxp","productSlug":"PCA9641PWJ","canonicalUrl":"https://icboms.com/nxp/PCA9641PWJ","factsUrl":"https://icboms.com/api/mcp/products/PCA9641PWJ","rawCanonicalId":null},"summary":{"shortDescription":"NXP PCA9641PWJ, I2C Buffer and Multiplexer, 2 channels, 2-Wire Bus input/output, 2.3 V to 3.6 V supply, 100 mA supply current, 6 pF input capacitance, -40°C to 85°C, 16-TSSOP package.","salesMarkdown":"## I2C bus buffer and multiplexer — what it does for your bus The NXP PCA9641PWJ is a 2-channel I2C bus buffer and multiplexer in a 16-TSSOP package. It sits between a master I2C controller and two downstream bus segments, buffering the clock and data lines while providing capacitive isolation. ## Supply voltage and temperature — where it fits The -40°C low end covers cold-start conditions in unheated enclosures. The 100 mA supply current is the total budget for the device itself plus whatever pull-up current the bus segments draw through the internal buffer. ## Two channels — segmenting the I2C bus With two channels, the PCA9641PWJ lets you isolate and independently enable two downstream I2C buses from a single master. This is useful when one segment has a device with a different supply voltage, a high capacitive load, or a device that could hang the bus. The input capacitance of 6 pF is low enough that it does not significantly load the upstream bus, even when both channels are disabled. ## Package and mounting — reflow profile note MSL level is not in the record, but TSSOP packages typically run MSL 1 or 2; if the reel's moisture barrier bag is intact, a bake before reflow is not normally needed, but confirm with the lot-specific label if the bag has been opened. ## Lifecycle — active, no end-of-life signal","metaTitle":"NXP PCA9641PWJ I2C Buffer Multiplexer, 2-Ch, 16-TSSOP","metaDescription":"NXP PCA9641PWJ I2C bus buffer and multiplexer, 2 channels, 2.3 V to 3.6 V supply, -40°C to 85°C, 16-TSSOP. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Type":"Buffer, Multiplexer","Input":"2-Wire Bus","Output":"2-Wire Bus","Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"I2C","Mounting Type":"Surface Mount","Package / Case":"16-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Current - Supply":"100mA","Voltage - Supply":"2.3V ~ 3.6V","Number of Channels":"2","Capacitance - Input":"6 pF","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"16-TSSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.05","priceTiers":[{"qty":1,"price":"$3.05000","currency":"USD"},{"qty":10,"price":"$2.73700","currency":"USD"},{"qty":25,"price":"$2.58800","currency":"USD"},{"qty":100,"price":"$2.24290","currency":"USD"},{"qty":250,"price":"$2.12784","currency":"USD"},{"qty":500,"price":"$1.90932","currency":"USD"},{"qty":1000,"price":"$1.61026","currency":"USD"},{"qty":2500,"price":"$1.52975","currency":"USD"},{"qty":5000,"price":"$1.47224","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9b4d3a58acd680e39360344620d0233f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/PCA9641PWJ/alternatives.json"},"ai":{"faq":[{"question":"Can PCA9641PWJ be used with 5V I2C?","answer":"No, the PCA9641PWJ has a maximum supply voltage of 3.6 V. It is not 5 V-tolerant on the I2C pins. If your bus runs at 5 V, you need a level translator between the 5 V domain and this part."},{"question":"What is PCA9641PWJ used for?","answer":"It is a 2-channel I2C bus buffer and multiplexer. It isolates and independently enables two downstream I2C bus segments from a single master, handling capacitive loading and preventing bus hangs on one segment from affecting the other."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/nxp/PCA9641PWJ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/nxp/PCA9641PWJ 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}}