{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PCF8574ARGYR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"PCF8574ARGYR","canonicalUrl":"https://icboms.com/texas-instruments/PCF8574ARGYR","factsUrl":"https://icboms.com/api/mcp/products/PCF8574ARGYR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments PCF8574ARGYR, I²C 8-bit I/O expander, 100 kHz clock, 2.5V~6V supply, 1mA source / 25mA sink, POR, interrupt output, -40°C~85°C, 20-VQFN (3.5x4.5).","salesMarkdown":"## What this I²C port expander does on the board It's a common fix when the MCU runs out of pins for pushbuttons, LEDs, or status sensors on an industrial control board or a piece of telecom equipment. The part includes a power-on reset (POR) so the outputs come up in a known state, and an interrupt output that lets the host sleep until an input changes — useful in battery-powered or low-power designs. The output drive is asymmetric: 1 mA source and 25 mA sink per pin. That sink current is enough to light a standard LED or pull a relay coil low through a transistor, but the weak source means you'll typically wire loads between the pin and VCC (sinking) rather than to ground (sourcing). If you need more than 25 mA total per package, watch the package dissipation — the 20-VQFN exposed pad helps, but stay within the current limit. The PCF8574ARGYR comes in a 20-VQFN with an exposed thermal pad (3.5 mm x 4.5 mm). That pad needs a good solder joint to the PCB ground plane for both thermal relief and mechanical stability. It's a surface-mount part, so rework with hot air is straightforward — just preheat the board to avoid lifting the pad. No stock or price figures here, but the RFQ process is straightforward.","metaTitle":"TI PCF8574ARGYR I²C 8-bit I/O Expander, 100 kHz","metaDescription":"Texas Instruments PCF8574ARGYR I²C 8-bit I/O expander with POR, interrupt output, 1 mA source / 25 mA sink. Industrial temp range. Active lifecycle.","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); Cut Tape (CT)","Features":"POR","Interface":"I²C","Output Type":"Push-Pull","Mounting Type":"Surface Mount","Number of I/O":"8","Package / Case":"20-VFQFN Exposed Pad","Product Status":"Active","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-VQFN (3.5x4.5)","Current - Output Source/Sink":"1mA, 25mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.9500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/fb696dd34b280bb875ac664bb0ca53b4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/PCF8574ARGYR/alternatives.json"},"ai":{"faq":[{"question":"What are alternatives to PCF8574ARGYR?","answer":"The PCF8574A is the same 8-bit I²C I/O expander with a different I²C address range (0x38–0x3F vs 0x20–0x27 for the PCF8574). If your host already uses addresses in the base range, the PCF8574A lets you put two expanders on the same bus without conflict. Both are pin-compatible and share the same package options."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/PCF8574ARGYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/PCF8574ARGYR 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}}