{"product_id":"pcf8574-i2c-io-expansion-module-8-channel","title":"PCF8574 I2C I\/O Expansion Module — 8-Channel GPIO Expander","description":"\u003ch2\u003ePCF8574 I2C I\/O Expansion Module — 8-Channel GPIO Expander\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003ePCF8574 I\/O expansion module\u003c\/strong\u003e adds \u003cstrong\u003e8 additional digital I\/O pins\u003c\/strong\u003e to any Arduino via just 2 I2C wires. With \u003cstrong\u003e3 address selection pins\u003c\/strong\u003e, up to \u003cstrong\u003e8 modules\u003c\/strong\u003e can be connected on a single I2C bus — expanding Arduino to \u003cstrong\u003e64 additional GPIO pins\u003c\/strong\u003e. Each pin can be independently configured as input or output. Commonly used to drive LCD displays via I2C.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIC: \u003cstrong\u003ePCF8574\u003c\/strong\u003e | Channels: \u003cstrong\u003e8 GPIO (input\/output)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eInterface: \u003cstrong\u003eI2C\u003c\/strong\u003e | Address range: \u003cstrong\u003e0x20–0x27 (3 address pins)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eMax modules per bus: \u003cstrong\u003e8 (64 total GPIO)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSupply voltage: \u003cstrong\u003e2.5–6V\u003c\/strong\u003e | Output current: \u003cstrong\u003e25mA per pin\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eInterrupt output: \u003cstrong\u003eYes (INT pin)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompliance: \u003cstrong\u003eRoHS compliant\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose This?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003e8 GPIO via 2 I2C wires\u003c\/strong\u003e — expand Arduino I\/O without using digital pins\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003e8 selectable addresses\u003c\/strong\u003e — stack up to 8 modules for 64 extra GPIO\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eInterrupt output\u003c\/strong\u003e — wake Arduino on input change\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eLCD I2C backpack compatible\u003c\/strong\u003e — standard chip for I2C LCD adapters\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eArduino GPIO expansion for large projects\u003c\/li\u003e\n\u003cli\u003eI2C LCD display backpack driver\u003c\/li\u003e\n\u003cli\u003eKeypad and button matrix scanning\u003c\/li\u003e\n\u003cli\u003eLED array and relay bank control\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":45670705955051,"sku":"","price":14.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/PCF8574-I2C-IO-Expansion-Module.jpg?v=1723009387","url":"https:\/\/keszoox.com\/products\/pcf8574-i2c-io-expansion-module-8-channel","provider":"Keszoox","version":"1.0","type":"link"}