{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PCF8574ADWE4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"PCF8574ADWE4","canonicalUrl":"https://icboms.com/texas-instruments/PCF8574ADWE4","factsUrl":"https://icboms.com/api/mcp/products/PCF8574ADWE4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments PCF8574ADWE4, I²C 8-bit I/O expander, 100 kHz clock, 2.5V to 6V supply, push-pull outputs, interrupt output, 16-SOIC, -40°C to 85°C.","salesMarkdown":"## 8-bit I²C I/O expander for GPIO-starved designs The push-pull outputs can sink 25 mA per pin — enough to drive an LED or a small relay directly — but source current is limited to 1 mA, so pulling a line high into a heavy load needs an external pull-up or a buffer. An interrupt output (active-low, open-drain) signals the host when any input changes state, reducing polling overhead. That means no end-of-life notice, no last-time-buy deadline, and no forced redesign for the foreseeable future.","metaTitle":"PCF8574ADWE4 I²C 8-bit I/O Expander, 100 kHz, 2.5-6V","metaDescription":"PCF8574ADWE4 I²C 8-bit I/O expander from TI, 100 kHz clock, 2.5V to 6V supply, push-pull outputs, interrupt output, -40°C to 85°C, active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Interface & Transceivers"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tube","Features":"POR","Interface":"I²C","Output Type":"Push-Pull","Mounting Type":"Surface Mount","Number of I/O":"8","Package / Case":"16-SOIC (0.295\\\", 7.50mm Width)","Clock Frequency":"100 kHz","lifecycle_stage":"eol_hot","Interrupt Output":"Yes","Voltage - Supply":"2.5V ~ 6V","Base Product Number":"PCF8574","Operating Temperature":"-40°C~85°C","Supplier Device Package":"16-SOIC","Current - Output Source/Sink":"1mA, 25mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/fb696dd34b280bb875ac664bb0ca53b4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/PCF8574ADWE4/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between PCF8574 and PCF8574A?","answer":"The PCF8574 and PCF8574A are functionally identical 8-bit I²C I/O expanders. The difference is the I²C slave address range: the PCF8574 uses addresses 0x20–0x27, while the PCF8574A uses 0x38–0x3F. This allows up to 16 expanders on the same bus without address conflict."},{"question":"Can PCF8574A work at 5V?","answer":"Yes, the PCF8574ADWE4 operates from 2.5V to 6V, so it works on a 5V supply without any issue."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/PCF8574ADWE4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/PCF8574ADWE4 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}}