{"product_id":"2004a-20x4-lcd-i2c","title":"2004A 20x4 LCD Display with I2C Module","description":"\u003cp\u003eThe \u003cstrong\u003e2004A 20x4 LCD Display with \u003ca href=\"https:\/\/www.chip.pk\/products\/i2c-lcd-module-pcf8574\" title=\"View PCF8574 I2C LCD Module\"\u003eI2C Module\u003c\/a\u003e\u003c\/strong\u003e is a 4-row character display for Arduino and other compatible microcontroller projects. Its I2C interface uses SDA and SCL communication, reducing the number of I\/O connections required compared with direct parallel interfacing.\u003c\/p\u003e\n\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e2004A 20x4 LCD with I2C interface\u003c\/strong\u003e provides four rows with up to 20 characters per row, making it suitable for displaying sensor readings, menus, measurements, system status and other text-based information.\u003c\/p\u003e\n\u003cp\u003eThis version includes a fitted \u003cstrong\u003eI2C interface module\u003c\/strong\u003e that converts the LCD's parallel interface for communication through the I2C bus. The external connection is simplified to \u003cstrong\u003eGND, VCC, SDA and SCL\u003c\/strong\u003e, while the onboard trimmer provides convenient LCD contrast adjustment.\u003c\/p\u003e\n\u003cp\u003eThe current Chip.pk stock shown in the supplied product images uses a \u003cstrong\u003ePCF8574T I2C I\/O expander\u003c\/strong\u003e. Because the exact I2C interface IC may vary between future stock batches, the permanent product identity is based on the \u003cstrong\u003e2004A 20x4 LCD with I2C module\u003c\/strong\u003e, rather than a specific expander IC.\u003c\/p\u003e\n\u003cp\u003eThe LCD itself uses a \u003cstrong\u003eKS0073 or equivalent controller\u003c\/strong\u003e and supports HD44780-compatible character LCD libraries. The combination of a four-row character display and I2C connectivity makes the module suitable for embedded systems and microcontroller projects where multiple lines of information are required.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e20 characters × 4 rows character display\u003c\/li\u003e\n\u003cli\u003eBlue LED backlight\u003c\/li\u003e\n\u003cli\u003eFitted I2C interface module\u003c\/li\u003e\n\u003cli\u003eCommunication through \u003cstrong\u003eSDA and SCL\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e4-pin I2C connection: \u003cstrong\u003eGND, VCC, SDA and SCL\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReduces microcontroller I\/O connections compared with direct parallel interfacing\u003c\/li\u003e\n\u003cli\u003eOnboard trimmer for LCD contrast adjustment\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePCF8574T I2C expander fitted on current stock\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKS0073 or equivalent\u003c\/strong\u003e LCD controller\u003c\/li\u003e\n\u003cli\u003eSupports HD44780-compatible character LCD libraries\u003c\/li\u003e\n\u003cli\u003eNative LCD supports 4-bit and 8-bit parallel interfacing\u003c\/li\u003e\n\u003cli\u003eSuitable for multi-line text, readings, menus and status information\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"group TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLCD Model\u003c\/td\u003e\n\u003ctd\u003e2004A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay Type\u003c\/td\u003e\n\u003ctd\u003eCharacter LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay Format\u003c\/td\u003e\n\u003ctd\u003e20 characters × 4 rows\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBacklight Color\u003c\/td\u003e\n\u003ctd\u003eBlue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLCD Controller\u003c\/td\u003e\n\u003ctd\u003eKS0073 or equivalent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController Package\u003c\/td\u003e\n\u003ctd\u003eCOB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI2C via fitted interface module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Stock I2C Expander\u003c\/td\u003e\n\u003ctd\u003ePCF8574T*\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Connections\u003c\/td\u003e\n\u003ctd\u003eGND, VCC, SDA, SCL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNative LCD Interface\u003c\/td\u003e\n\u003ctd\u003e4-bit \/ 8-bit parallel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNative LCD Pin Configuration\u003c\/td\u003e\n\u003ctd\u003e1-VSS (GND), 2-VDD (Power), 3-VO (Contrast), 4-RS, 5-R\/W, 6-E, 7–14-D0–D7, 15-A (Backlight Anode), 16-K (Backlight Cathode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContrast Adjustment\u003c\/td\u003e\n\u003ctd\u003eOnboard trimmer potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLibrary Compatibility\u003c\/td\u003e\n\u003ctd\u003eHD44780-compatible character LCD libraries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay Mode\u003c\/td\u003e\n\u003ctd\u003eSTN\/FSTN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eViewing Direction\u003c\/td\u003e\n\u003ctd\u003e6 o'clock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLCD Module Size\u003c\/td\u003e\n\u003ctd\u003e98 × 60 × 13.8 mm**\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eViewing Area\u003c\/td\u003e\n\u003ctd\u003e76 × 26 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharacter Size\u003c\/td\u003e\n\u003ctd\u003e2.94 × 4.74 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDot Size\u003c\/td\u003e\n\u003ctd\u003e0.54 × 0.54 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-20°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e* \u003cstrong\u003eStock note:\u003c\/strong\u003e The supplied\/current stock uses a PCF8574T I2C expander. The exact I2C interface IC may vary between stock batches while maintaining the same product function. Check the received module when an exact IC version is required.\u003c\/p\u003e\n\u003cp\u003e** The stated dimensions are for the LCD module. Components on the fitted I2C board may increase the total assembled depth.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eI2C address note:\u003c\/strong\u003e A fixed I2C address is intentionally not specified because it can depend on the I2C expander version and address configuration. The address should be confirmed for the supplied module using an I2C scanner or appropriate hardware documentation.\u003c\/p\u003e\n\u003ch3\u003eApplications \/ Use Cases\u003c\/h3\u003e\n\u003cp\u003eThe 2004A 20x4 I2C LCD is suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSensor and measurement displays\u003c\/li\u003e\n\u003cli\u003eTemperature and humidity monitoring\u003c\/li\u003e\n\u003cli\u003eEmbedded system interfaces\u003c\/li\u003e\n\u003cli\u003eEquipment status displays\u003c\/li\u003e\n\u003cli\u003eMenu-based control systems\u003c\/li\u003e\n\u003cli\u003eCounters and monitoring systems\u003c\/li\u003e\n\u003cli\u003eData acquisition projects\u003c\/li\u003e\n\u003cli\u003eAutomation prototypes\u003c\/li\u003e\n\u003cli\u003eMicrocontroller development projects\u003c\/li\u003e\n\u003cli\u003eMulti-line text and parameter displays\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eThe display can be used with \u003cstrong\u003emicrocontrollers and development boards that provide a compatible I2C interface\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIt is commonly used with Arduino boards and similar embedded platforms. The specific \u003cstrong\u003eSDA and SCL pins depend on the development board\u003c\/strong\u003e, so the wiring should follow the documentation for the board being used.\u003c\/p\u003e\n\u003cp\u003eThe LCD controller supports \u003cstrong\u003eHD44780-compatible character LCD libraries\u003c\/strong\u003e. When operating through the fitted I2C interface, the selected software library and configuration must also be appropriate for the I2C interface fitted to the supplied module.\u003c\/p\u003e\n\u003cp\u003eBecause the exact I2C expander can vary between stock batches, users who depend on a specific expander IC or address should verify the received hardware before configuring their software.\u003c\/p\u003e\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1 × 2004A 20x4 LCD Display with fitted I2C interface module\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe exact I2C expander IC fitted to the interface board may vary by stock batch.\u003c\/p\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1. What is a 2004A 20x4 I2C LCD?\u003c\/strong\u003e\u003cbr\u003eThe 2004A is a character LCD capable of displaying \u003cstrong\u003e20 characters per row across 4 rows\u003c\/strong\u003e. This version includes a fitted I2C interface module, allowing communication through SDA and SCL instead of directly wiring the LCD's parallel data and control lines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. What are the connections on the I2C module?\u003c\/strong\u003e\u003cbr\u003eThe fitted I2C interface provides four external connections: \u003cstrong\u003eGND, VCC, SDA and SCL\u003c\/strong\u003e. SDA is the I2C data line, while SCL is the I2C clock line.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. What I2C expander IC is used on this 20x4 LCD?\u003c\/strong\u003e\u003cbr\u003eThe current Chip.pk stock shown uses a \u003cstrong\u003ePCF8574T I2C I\/O expander\u003c\/strong\u003e. The exact I2C expander may vary between stock batches, so users requiring a particular IC version should verify the supplied module.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Can the 2004A 20x4 I2C LCD be used with Arduino?\u003c\/strong\u003e\u003cbr\u003eYes. The display can be used with compatible \u003cstrong\u003eArduino boards that support I2C communication\u003c\/strong\u003e. SDA and SCL pin locations depend on the particular board, and the software configuration should match the I2C interface fitted to the display.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Does this LCD support HD44780-compatible libraries?\u003c\/strong\u003e\u003cbr\u003eThe \u003cstrong\u003eKS0073 or equivalent LCD controller\u003c\/strong\u003e supports HD44780-compatible character LCD commands. When the display is operated through its fitted I2C interface, an appropriate I2C LCD library and configuration are also required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6. What is the I2C address of this LCD module?\u003c\/strong\u003e\u003cbr\u003eA fixed I2C address should not be assumed because it can depend on the fitted I2C expander and its address configuration. The address can be identified using an \u003cstrong\u003eI2C scanner\u003c\/strong\u003e with the connected microcontroller.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. How do I adjust the contrast of the 20x4 LCD?\u003c\/strong\u003e\u003cbr\u003eThe fitted I2C interface board includes an onboard \u003cstrong\u003etrimmer potentiometer\u003c\/strong\u003e for contrast adjustment. It can be adjusted until the displayed characters are clearly visible.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8. What is a 20x4 I2C LCD used for?\u003c\/strong\u003e\u003cbr\u003eA 20x4 I2C LCD is suitable for \u003cstrong\u003esensor readings, measurement systems, menus, equipment status, counters, control panels and other embedded projects\u003c\/strong\u003e requiring multiple lines of text.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e9. Where can I buy a 2004A 20x4 I2C LCD in Pakistan?\u003c\/strong\u003e\u003cbr\u003eYou can order the \u003cstrong\u003e2004A 20x4 LCD Display with I2C Module\u003c\/strong\u003e online from Chip.pk for electronics, embedded systems and microcontroller projects in Pakistan.\u003c\/p\u003e","brand":"Chip.pk","offers":[{"title":"Default Title","offer_id":52916543979805,"sku":"LCD-2004A-20X4-I2C","price":1230.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0998\/1060\/7389\/files\/chip_pk_lcd_i2c_1.webp?v=1789135021","url":"https:\/\/www.chip.pk\/products\/2004a-20x4-lcd-i2c","provider":"Chip.pk","version":"1.0","type":"link"}