2004A 20x4 LCD Display with I2C Module
RS.1,230
Sale price
RS.1,230
Regular price
RS.
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2004A 20x4 LCD Display with I2C Module
RS.1,230
Sale price
RS.1,230
Regular price
RS.
Product Overview
The 2004A 20x4 LCD Display with I2C Module 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.
Description
The 2004A 20x4 LCD with I2C interface 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.
This version includes a fitted I2C interface module that converts the LCD's parallel interface for communication through the I2C bus. The external connection is simplified to GND, VCC, SDA and SCL, while the onboard trimmer provides convenient LCD contrast adjustment.
The current Chip.pk stock shown in the supplied product images uses a PCF8574T I2C I/O expander. Because the exact I2C interface IC may vary between future stock batches, the permanent product identity is based on the 2004A 20x4 LCD with I2C module, rather than a specific expander IC.
The LCD itself uses a KS0073 or equivalent controller 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.
Key Features
- 20 characters × 4 rows character display
- Blue LED backlight
- Fitted I2C interface module
- Communication through SDA and SCL
- 4-pin I2C connection: GND, VCC, SDA and SCL
- Reduces microcontroller I/O connections compared with direct parallel interfacing
- Onboard trimmer for LCD contrast adjustment
- PCF8574T I2C expander fitted on current stock
- KS0073 or equivalent LCD controller
- Supports HD44780-compatible character LCD libraries
- Native LCD supports 4-bit and 8-bit parallel interfacing
- Suitable for multi-line text, readings, menus and status information
Technical Specifications
| Specification | Details |
|---|---|
| LCD Model | 2004A |
| Display Type | Character LCD |
| Display Format | 20 characters × 4 rows |
| Backlight Color | Blue |
| LCD Controller | KS0073 or equivalent |
| Controller Package | COB |
| Interface | I2C via fitted interface module |
| Current Stock I2C Expander | PCF8574T* |
| External Connections | GND, VCC, SDA, SCL |
| Native LCD Interface | 4-bit / 8-bit parallel |
| Native LCD Pin Configuration | 1-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) |
| Contrast Adjustment | Onboard trimmer potentiometer |
| Library Compatibility | HD44780-compatible character LCD libraries |
| Display Mode | STN/FSTN |
| Viewing Direction | 6 o'clock |
| LCD Module Size | 98 × 60 × 13.8 mm** |
| Viewing Area | 76 × 26 mm |
| Character Size | 2.94 × 4.74 mm |
| Dot Size | 0.54 × 0.54 mm |
| Operating Temperature | -20°C to +70°C |
* Stock note: 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.
** The stated dimensions are for the LCD module. Components on the fitted I2C board may increase the total assembled depth.
I2C address note: 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.
Applications / Use Cases
The 2004A 20x4 I2C LCD is suitable for:
- Sensor and measurement displays
- Temperature and humidity monitoring
- Embedded system interfaces
- Equipment status displays
- Menu-based control systems
- Counters and monitoring systems
- Data acquisition projects
- Automation prototypes
- Microcontroller development projects
- Multi-line text and parameter displays
Compatibility
The display can be used with microcontrollers and development boards that provide a compatible I2C interface.
It is commonly used with Arduino boards and similar embedded platforms. The specific SDA and SCL pins depend on the development board, so the wiring should follow the documentation for the board being used.
The LCD controller supports HD44780-compatible character LCD libraries. 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.
Because 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.
Package Contents
1 × 2004A 20x4 LCD Display with fitted I2C interface module
The exact I2C expander IC fitted to the interface board may vary by stock batch.
FAQs
1. What is a 2004A 20x4 I2C LCD?
The 2004A is a character LCD capable of displaying 20 characters per row across 4 rows. 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.
2. What are the connections on the I2C module?
The fitted I2C interface provides four external connections: GND, VCC, SDA and SCL. SDA is the I2C data line, while SCL is the I2C clock line.
3. What I2C expander IC is used on this 20x4 LCD?
The current Chip.pk stock shown uses a PCF8574T I2C I/O expander. The exact I2C expander may vary between stock batches, so users requiring a particular IC version should verify the supplied module.
4. Can the 2004A 20x4 I2C LCD be used with Arduino?
Yes. The display can be used with compatible Arduino boards that support I2C communication. SDA and SCL pin locations depend on the particular board, and the software configuration should match the I2C interface fitted to the display.
5. Does this LCD support HD44780-compatible libraries?
The KS0073 or equivalent LCD controller 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.
6. What is the I2C address of this LCD module?
A 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 I2C scanner with the connected microcontroller.
7. How do I adjust the contrast of the 20x4 LCD?
The fitted I2C interface board includes an onboard trimmer potentiometer for contrast adjustment. It can be adjusted until the displayed characters are clearly visible.
8. What is a 20x4 I2C LCD used for?
A 20x4 I2C LCD is suitable for sensor readings, measurement systems, menus, equipment status, counters, control panels and other embedded projects requiring multiple lines of text.
9. Where can I buy a 2004A 20x4 I2C LCD in Pakistan?
You can order the 2004A 20x4 LCD Display with I2C Module online from Chip.pk for electronics, embedded systems and microcontroller projects in Pakistan.