{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PCA9545APW,118","brand":"NXP Semiconductors","brandSlug":"nxp","productSlug":"PCA9545APW118","canonicalUrl":"https://icboms.com/nxp/PCA9545APW118","factsUrl":"https://icboms.com/api/mcp/products/PCA9545APW%2C118","rawCanonicalId":null},"summary":{"shortDescription":"NXP PCA9545APW,118, 4-Channel I²C/SMBus Switch, 2.3V–5.5V supply, 20-TSSOP (4.40mm width), Surface Mount, Active, ROHS3 compliant.","salesMarkdown":"## What the PCA9545APW,118 does on the bus The NXP PCA9545APW,118 is a 4-channel I²C switch in a 20-TSSOP package. It lets one upstream I²C master talk to any of four downstream bus segments, one at a time — useful for resolving address conflicts when multiple identical I²C slaves share the same bus, or for isolating bus segments during fault recovery. ## Supply voltage and logic compatibility The 2.3V–5.5V supply covers the common I²C bus voltages. At 3.3V the switch passes logic-low thresholds cleanly; at 5V it meets the full I²C specification for rise times and noise margins. No separate VDDIO pin — the same rail powers the internal logic and the bus switches, so the upstream and downstream segments must share the same supply voltage. ## Package and board fit The 20-TSSOP body is 4.40 mm wide, 6.5 mm long, with 0.65 mm pin pitch — a standard footprint that routes easily on two-layer boards. Surface-mount only; no through-hole variant. The reel (Tape & Reel) and cut-tape options let you order exactly the quantity needed for prototype or production. ## Lifecycle and compliance Store the reels dry: MSL level is not stated here, but 20-TSSOP packages typically run MSL 1 or 2 — check the reel label for floor-life limits before reflow.","metaTitle":"NXP PCA9545APW,118 I²C Switch, 4-Channel, 20-TSSOP, Active","metaDescription":"NXP PCA9545APW,118 4-channel I²C/SMBus switch in 20-TSSOP. Supply 2.3V–5.5V. Active lifecycle, ROHS3 compliant.","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":"4-Channel I²C Switcher","Mounting Type":"Surface Mount","Package / Case":"20-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.3V ~ 5.5V","Supplier Device Package":"20-TSSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.32","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.32000","currency":"USD"},{"qty":10,"price":"$2.08200","currency":"USD"},{"qty":25,"price":"$1.96360","currency":"USD"},{"qty":100,"price":"$1.67310","currency":"USD"},{"qty":250,"price":"$1.57100","currency":"USD"},{"qty":500,"price":"$1.37464","currency":"USD"},{"qty":1000,"price":"$1.24185","currency":"USD"},{"qty":2500,"price":"$1.24185","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7e2f0fa27e6d3b564c5dc6c8dadfa36a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does PCA9545APW have an RoHS compliant equivalent?","answer":"The PCA9545APW,118 itself is ROHS3 compliant. The suffix '118' indicates the reel packing and RoHS-compliant finish. There is no separate non-RoHS version of this exact order code."},{"question":"What is the PCA9545APW used for?","answer":"It is a 4-channel I²C switch. Typical use: connecting one I²C master to up to four separate downstream buses, resolving address conflicts when multiple slaves share the same address, or isolating a bus segment during fault diagnostics."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/nxp/PCA9545APW118","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/nxp/PCA9545APW118 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}}