Do you need more general purpose outputs, a keypad interface (up to a 5x5 Keypad), and a cool screen? If you answered yes to more than one of these items, this is the LCD for you! Below is a description with information relating to the size and functionality of this new device. The Matrix Orbital part number is LK204-25-WB. This version is pre-modified for BASIC Stamp module-compatibility.
Features:
- 20x4 Display
- Keypad Interface: 25 (5x5)
- 6 General Purpose Output
- Horizontal & Vertical bar graph modes
- Large Digits
- Automatic Line Wrapping & Scrolling
- Appearance: Inverse Blue with White Backlight
- RS232 mode (Compatible with TTL levels) : 1200bps to 19.2 Kbps
- I2C mode: Serial transfers of up to 100 Kbps & connect up to 16 displays
- Fully Buffered - no delays in transmission
Key Specifications:
- Power Requirements: 5 VDC @ 40 mA (Backlight Off) / 110 mA (Backlight On)
- Communication: Asynchronous serial (TTL) or I2C
- Dimensions: 3.86 x 2.36 x 1.20 in (98 x 60 x 30.63 mm)
- Operating Temperature: +32 to +122 °F (0 to +50 °C)

Downloads & Resources:
4x20 Serial LCD Manual (.pdf)
Old 4x20 Serial LCD Manual (.pdf)
Errata for LK204-25 v1.2 (.pdf)