{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PCF8574APWRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"PCF8574APWRG4","canonicalUrl":"https://icboms.com/texas-instruments/PCF8574APWRG4","factsUrl":"https://icboms.com/api/mcp/products/PCF8574APWRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments PCF8574APWRG4 I2C I/O expander, 8 push-pull GPIOs, 100 kHz I²C, 2.5V-6V supply, 1 mA source / 25 mA sink per pin, interrupt output, -40°C to 85°C, 20-TSSOP, Tape & Reel.","salesMarkdown":"## 8 GPIOs on the I²C bus — what the 25 mA sink buys you The I²C interface runs at 100 kHz standard mode, and the part includes a POR (power-on reset) feature that holds the outputs in a known state until the bus is configured. ## Interrupt output — saves you from polling the bus An interrupt output pin (INT) is present, which asserts when any input changes state. That lets the host MCU stay in a low-power sleep mode and only wake when a button is pressed or a sensor trips, rather than polling the I²C bus every few milliseconds. On a battery-powered panel or a remote sensor node, that interrupt line can cut firmware complexity and average current draw noticeably.","metaTitle":"TI PCF8574APWRG4 I2C I/O Expander, 8 GPIO, 100 kHz, 20-TSSOP","metaDescription":"Texas Instruments PCF8574APWRG4 I2C I/O expander with 8 push-pull GPIOs, 25 mA sink, interrupt output, 2.5V-6V supply, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Interface & Transceivers"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR)","Features":"POR","Interface":"I²C","Output Type":"Push-Pull","Mounting Type":"Surface Mount","Number of I/O":"8","Package / Case":"20-TSSOP (0.173\\\", 4.40mm 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":"20-TSSOP","Current - Output Source/Sink":"1mA, 25mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.3400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/fb696dd34b280bb875ac664bb0ca53b4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/PCF8574APWRG4/alternatives.json"},"ai":{"faq":[{"question":"Does PCF8574APWRG4 have an interrupt output?","answer":"Yes, it has an interrupt output pin that asserts when any input changes state, allowing event-driven firmware instead of bus polling."},{"question":"What is the difference between PCF8574APWR and PCF8574APWRG4?","answer":"The PCF8574APWRG4 is the lead-free / RoHS-compliant variant of the PCF8574APWR. Both share the same 20-TSSOP footprint, 8 GPIOs, I²C interface, and electrical specs — the G4 suffix indicates the green/RoHS finish. They are pin-compatible and functionally identical."},{"question":"What is the footprint/package of PCF8574APWRG4?","answer":"It comes in a 20-TSSOP package (0.173\", 4.40 mm width), surface-mount, supplied in Tape & Reel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/PCF8574APWRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/PCF8574APWRG4 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}}