The LCD 2004a 20x4 blue color display is a commonly used module in various devices and circuits. It is an economical and easily programmable display that has no limitation in displaying special and even custom characters and animations. This module utilizes the HD44780 parallel interface chipset and has two registers: Command and Data.

The LCD can display 20 characters per line and there are 4 such lines, for a total of 80 characters displayed. The display uses a 5x7 pixel matrix to display each character. Interfacing code for this display is easily accessible, requiring only 11 input and output pinouts for interfacing with other components such as PIC, Raspberry PI, and Arduino.

This LCD display has a wide viewing angle and high contrast with a 5x7 matrix cursor display mode. It supports both 4-bit and 8-bit data transfer modes and operates with either 3V or 5V DC input supply. The module also comes with two 16 positions male headers. The module size is 98mm x 60mm x 14mm, with a black metal bezel of 98mm x 40mm and a viewing area of 76mm x 25.2mm.

Features:

20 Characters x 4 Lines
Built-in HD44780 Equivalent LCD Controller
Works directly with ATMEGA, ARDUINO, PIC and many other microcontroller/kits.
4 or 8 bit data I/O interface
Low power consumption

Specifications:

Display Format: 20 Characters x 4 Lines
Dot Matrix (W x H): 5 x 8 Dots
Character Size (W x H): 2.95 x 4.75 mm
Character Pitch (W x H): 3.55 x 5.35 mm
LCD Driver IC: ST7066U (or equivalent)
Interface: 4-bit Parallel and 8-bit Parallel
LCD Module Dimensions (W x H x D): 98 x 60 x 13.6 (max) mm
Viewing Area (W x H): 77 x 25.2 mm
Dot Size (W x H): 0.55 x 0.55 mm
Dot Pitch (W x H): 0.6 x 0.6 mm
Driving Method: 1/16 Duty
Operating Temperature: -20 ~ 70°C