{"product_id":"pcf8574-i2c-io-expander-module-lcd1602-lcd2004-serial-adapter-arduino","title":"PCF8574 I²C I\/O Expander Module — LCD1602 \/ LCD2004 Serial Interface Adapter for Arduino","description":"\u003ch2\u003ePCF8574 I²C I\/O Expander Module — LCD1602 \/ LCD2004 Serial Interface Adapter\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003ePCF8574 I²C adapter module\u003c\/strong\u003e converts your standard parallel-interface LCD1602 or LCD2004 display into an I²C serial device, reducing the required GPIO pins from 6 to just 2 (SDA + SCL). This makes it ideal for Arduino, Raspberry Pi, and other microcontroller projects where GPIO pins are limited.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eIC\u003c\/td\u003e\n\u003ctd\u003ePCF8574 \/ PCF8574A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI²C (2-wire: SDA + SCL)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI²C Address\u003c\/td\u003e\n\u003ctd\u003e0x20–0x27 (A0–A2 jumper selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Displays\u003c\/td\u003e\n\u003ctd\u003eLCD1602, LCD2004 (HD44780 controller)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBacklight Control\u003c\/td\u003e\n\u003ctd\u003eYes (jumper on\/off)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContrast Adjustment\u003c\/td\u003e\n\u003ctd\u003eYes (onboard potentiometer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003e4-pin (GND, VCC, SDA, SCL)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose This I²C Adapter?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eSaves 4 GPIO pins\u003c\/strong\u003e — only SDA and SCL needed vs. 6-pin parallel wiring\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eAddress selectable\u003c\/strong\u003e — up to 8 modules on the same I²C bus\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eBacklight jumper\u003c\/strong\u003e — easily enable or disable LCD backlight\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eOnboard contrast pot\u003c\/strong\u003e — no external trimmer required\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eArduino library support\u003c\/strong\u003e — works with LiquidCrystal_I2C library out of the box\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eArduino LCD display projects with minimal GPIO usage\u003c\/li\u003e\n\u003cli\u003eRaspberry Pi I²C LCD interfacing\u003c\/li\u003e\n\u003cli\u003eSensor data display on LCD1602 \/ LCD2004\u003c\/li\u003e\n\u003cli\u003eMenu-driven embedded UI systems\u003c\/li\u003e\n\u003cli\u003eIoT device status displays\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1 × PCF8574 I²C LCD Adapter Module (pre-soldered to LCD or standalone)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"RED","offer_id":46991427895531,"sku":"14:4044226#RED","price":6.24,"currency_code":"USD","in_stock":true},{"title":"Purple","offer_id":46991427928299,"sku":"14:351074#Purple","price":8.04,"currency_code":"USD","in_stock":true},{"title":"Blue","offer_id":46991427961067,"sku":"14:350852#Blue","price":6.24,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":46991427993835,"sku":"14:1202#Black","price":5.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/pcf8574-i2c-io-expander-lcd-adapter.webp?v=1761884578","url":"https:\/\/keszoox.com\/products\/pcf8574-i2c-io-expander-module-lcd1602-lcd2004-serial-adapter-arduino","provider":"Keszoox","version":"1.0","type":"link"}