{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PCA9518DW","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"PCA9518DW","canonicalUrl":"https://icboms.com/texas-instruments/PCA9518DW","factsUrl":"https://icboms.com/api/mcp/products/PCA9518DW","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments PCA9518DW, I²C buffer, 3V–3.6V supply, 20-SOIC (0.295\", 7.50mm Width), surface mount, Tube, active lifecycle.","salesMarkdown":"## What the PCA9518DW is and where it fits The Texas Instruments PCA9518DW is a specialized I²C interface buffer IC in a 20-pin SOIC package. It sits between a master I²C controller and a segmented bus, buffering the clock (SCL) and data (SDA) lines to extend the physical reach or increase the fan-out of the bus. The supply range of 3V to 3.6V makes it a direct fit for standard 3.3V I²C domains found in telecom line cards, industrial control backplanes, and multi-board server systems where a single I²C segment must span several connectors. ## Supply voltage — the fit gate for 3.3V I²C buses The PCA9518DW operates from 3V to 3.6V, covering the nominal 3.3V rail. ## Package and mounting — 20-SOIC wide body The part comes in a 20-SOIC package with 0.295-inch (7.50 mm) body width — the wide SOIC variant. It is a surface-mount device. ## Lifecycle and compliance The PCA9518DW carries an active lifecycle status and is ROHS3 compliant. There is no end-of-life notice, no last-time-buy window.","metaTitle":"PCA9518DW I²C Buffer, 3V-3.6V, 20-SOIC, Active","metaDescription":"PCA9518DW I²C buffer IC from Texas Instruments, 3V to 3.6V supply, 20-pin SOIC. Active, ROHS3 compliant. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Interface":"I²C","Applications":"Buffer","Mounting Type":"Surface Mount","Package / Case":"20-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Supplier Device Package":"20-SOIC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.59","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.59000","currency":"USD"},{"qty":10,"price":"$2.32600","currency":"USD"},{"qty":25,"price":"$2.19440","currency":"USD"},{"qty":100,"price":"$1.86950","currency":"USD"},{"qty":250,"price":"$1.75536","currency":"USD"},{"qty":500,"price":"$1.53594","currency":"USD"},{"qty":1000,"price":"$1.27264","currency":"USD"},{"qty":2500,"price":"$1.24200","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7f9ba0a25253cc624fbe7d1572f6b44d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between PCA9518DW and PCA9518DWR?","answer":"The die and electrical specifications are identical. The only difference is the shipping medium: PCA9518DW ships in Tube, while PCA9518DWR ships in Tape & Reel."},{"question":"Does PCA9518DW require external pull-up resistors?","answer":"Yes, as a standard I²C buffer, the PCA9518DW requires external pull-up resistors on the SCL and SDA lines on both the master and buffered bus segments. The resistor value depends on the bus capacitance and the desired rise time."},{"question":"Is PCA9518DW compatible with 3.3V I²C logic?","answer":"Yes, the 3V to 3.6V supply range covers 3.3V nominal operation, so it is fully compatible with 3.3V I²C logic levels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/PCA9518DW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/PCA9518DW 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}}