{"product_id":"i2c-lcd-backpack-pcf8574","title":"I2C \/ IIC Serial Interface Backpack Module for Character LCD (PCF8574)","description":"\u003ch1\u003eI2C \/ IIC Serial Interface Backpack Module for Character LCD (PCF8574)\u003c\/h1\u003e\n\u003cp\u003eAn I2C backpack that solders to the back of a parallel character LCD and drives it over just two data wires using a PCF8574 expander. It reduces a 16-pin parallel LCD to a 2-wire I2C connection.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003ePCF8574 I2C expander IC\u003c\/li\u003e\n  \u003cli\u003e5V operating voltage\u003c\/li\u003e\n  \u003cli\u003eConverts I2C to parallel for LCD\u003c\/li\u003e\n  \u003cli\u003e2 IIC interfaces\u003c\/li\u003e\n  \u003cli\u003eContrast potentiometer\u003c\/li\u003e\n  \u003cli\u003eBacklight jumper\u003c\/li\u003e\n  \u003cli\u003eAddress-changeable via solder jumpers (up to 8 on one bus)\u003c\/li\u003e\n  \u003cli\u003ePCB 4.2 x 2 cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatible with\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e16x2 character LCD\u003c\/li\u003e\n  \u003cli\u003e20x4 character LCD\u003c\/li\u003e\n  \u003cli\u003eArduino and most microcontrollers\u003c\/li\u003e\n  \u003cli\u003eHD44780-compatible displays\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuild it with Compoden's AI\u003c\/h2\u003e\u003cp\u003eTell Compoden's AI build assistant what you want to display and it picks a compatible screen, checks it against your board's interface and voltage, and hands you the wiring and the driver code matched to the exact module - all from real in-stock parts.\u003c\/p\u003e\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eWe have spent 10 years supplying displays, boards, and parts to makers, schools, and engineering teams across India. Every Compoden order includes our AI build companion to help you wire the screen and write the driver code.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat chip does it use?\u003c\/summary\u003e\u003cp\u003eA PCF8574 I2C I\/O expander.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhich displays does it fit?\u003c\/summary\u003e\u003cp\u003eStandard HD44780 parallel character LCDs including 16x2 and 20x4.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use more than one on the same bus?\u003c\/summary\u003e\u003cp\u003eYes, the address is changeable via solder jumpers, allowing up to 8 modules on one I2C bus.\u003c\/p\u003e\u003c\/details\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"Product\", \"name\": \"I2C \/ IIC Serial Interface Backpack Module for Character LCD (PCF8574)\", \"brand\": {\"@type\": \"Organization\", \"name\": \"Compoden\"}, \"mpn\": \"PCF8574\"}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What chip does it use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A PCF8574 I2C I\/O expander.\"}}, {\"@type\": \"Question\", \"name\": \"Which displays does it fit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Standard HD44780 parallel character LCDs including 16x2 and 20x4.\"}}, {\"@type\": \"Question\", \"name\": \"Can I use more than one on the same bus?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, the address is changeable via solder jumpers, allowing up to 8 modules on one I2C bus.\"}}]}\u003c\/script\u003e","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53479316783469,"sku":null,"price":43.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/product_e2ddf612-0a6a-47f5-8f79-ff47b311e756.webp?v=1782207836","url":"https:\/\/compoden.com\/products\/i2c-lcd-backpack-pcf8574","provider":"Compoden","version":"1.0","type":"link"}