Key Features:

1. Character Dimensions: The display consists of 16 columns and 2 rows of characters, forming a grid of 16x2 characters. Each character is typically 5x8 pixels in size.
2. Display Technology: Most 16x2 LCDs use Twisted Nematic (TN) or Super Twisted Nematic (STN) technology. They are passive matrix displays that rely on the properties of liquid crystals to modulate light and create visible characters.
3. Controller Chip: The most common controller chip for these displays is the HD44780 or an equivalent. The controller facilitates easy interfacing with microcontrollers and provides commands for controlling the display.
4. Interface: 16x2 LCDs usually have a parallel interface for connecting to microcontrollers or other digital devices. The interface requires several data lines (typically 4 or 8 bits), a control line for indicating data or command, and control lines for read/write and enabling the display.
5. Backlight: Some 16x2 LCD displays come with a built-in LED backlight to enhance visibility in low-light conditions. The backlight is often controlled separately from the character display.
6. Voltage and Power Consumption: LCD displays typically operate at low voltages (e.g., 5V) and have low power consumption. The power requirements and voltage levels vary between different models, so it's important to check the datasheet.
7. I2C Interface: Simplifies communication between the microcontroller and LCD, reducing the number of required pins and easing integration into projects.