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I2C Interface Module for 16×2 LCD (PCF8574)

I2C Interface Module for 16×2 LCD (PCF8574)

Original price was: ₹99.00.Current price is: ₹69.00. GST

The I2C LCD Backpack PCF8574 is used to convert a standard parallel LCD into an I2C-controlled display, reducing the number of required pins. It works perfectly with 16×2 LCD Display Module Blue, Arduino Uno R3, and ESP32 Development Board.

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The I2C LCD Interface Module (commonly called an I2C backpack) allows you to control a 16×2 LCD display using only two wires (SDA and SCL) instead of multiple parallel data pins.

This module is based on the PCF8574 I/O expander IC, which converts I2C data into parallel signals required by the LCD. It includes an onboard potentiometer for contrast adjustment and provides an easy plug-and-play solution.

By using this module, you can save GPIO pins and simplify wiring, making it ideal for Arduino, ESP32, ESP8266, and other microcontroller projects.

Key Features

  • Converts LCD to I2C interface
  • Uses only 2 communication pins (SDA, SCL)
  • Based on PCF8574 I/O expander
  • Adjustable contrast via onboard potentiometer
  • Reduces wiring complexity
  • Compatible with 16×2 and 20×4 LCD displays

Technical Specifications

Parameter Value
Operating Voltage 5V
Interface I2C
IC Used PCF8574
I2C Address 0x27 / 0x3F (configurable)
Compatibility 16×2, 20×4 LCD

Pin Configuration

I2C Side

Pin Description
VCC Power Supply (5V)
GND Ground
SDA I2C Data
SCL I2C Clock

LCD Side

  • Directly connects to LCD 16-pin header

What’s in the Box

  • 1 × I2C LCD Interface Module (PCF8574)
Weight 0.005 kg
Dimensions 4.1 × 1.9 × 1.0 cm

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