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Data Vision DV-20208 HD44780-compatible 20x2 5x7 dot matrix character LCD with YELLOW-GREEN LED backlight. Unit is approximately 3.79" x 2.61" x 0.55" overall with 4 mounting holes. Other dimensions match the standard DV-20200 datasheet (see below). These have 20 solder pads at standard 0.1" pitch.
These do not require a negative contrast voltage. 0.7V seems to be optimal at room temperature. The LED backlight requires a minimum of 5.5V to light. You'll need at least 5.7V for optimal brightness. If you're going to power the backlight from a PC, you'll need a 180 Ohm (¼ Watt) resistor in series with 12V.
We've tested this display with LCDSmartie 5.3 (http://lcdsmartie.sourceforge.net/) using their recommended wiring (pins 1-14 only, click here for diagram).
Pin Assignment
| Pin |
Function |
| 1 |
0V |
| 2 |
5V |
| 3 |
contrast (0.7V
typical) |
| 4 |
RS |
| 5 |
R/W |
| 6 |
E |
| 7 |
D0 |
| 8 |
D1 |
| 9 |
D2 |
| 10 |
D3 |
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| Pin |
Function |
| 11 |
D4 |
| 12 |
D5 |
| 13 |
D6 |
| 14 |
D7 |
| 15 |
0V (same as pin 1) |
| 16 |
no connection |
| 17 |
no connection |
| 18 |
metal frame |
| 19 |
LED backlight +
(5.7V @ 30mA) |
| 20 |
LED backlight - |
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