character 40x4 lcd display, 40x4 lcd module — A 40 character by 4 line character LCD module in FSTN and COB construction with an HD44780 compatible controller, the largest character format in this range at 160 characters of text, driven over a 6800 series 8-bit or 4-bit MPU interface.
Specifications
| Model | MLC404Y-1 |
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| Format | 40 characters x 4 lines |
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| Build | COB |
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| Controller | HD44780 compatible (SPLC780D or equivalent) |
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| Display mode | FSTN |
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| Interface | 6800 series, 8-bit / 4-bit MPU |
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| Viewing direction | 6 o'clock |
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| Backlight | White / Yellow LED |
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| Operating temperature | -20 to +70 degree |
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| Storage temperature | -30 to +80 degree |
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Compare with nearby character LCD sizes
| Format | Controller | Interface | Backlight |
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| 40 x 2 | HD44780 compatible | 6800, 8-bit / 4-bit | White / Yellow LED |
| 40 x 4 | HD44780 compatible | 6800, 8-bit / 4-bit | White / Yellow LED |
FAQ
How many enable lines does the 40x4 need?
Two. The module behaves as two 40 x 2 halves, each with its own enable, so the host toggles E1 for the upper pair of lines and E2 for the lower pair.
Can the 40x4 be used to replace a graphic display?
If your screen only shows fixed labels and values, a 40x4 character module is simpler to drive and cheaper than a graphic LCD. If you need bitmaps or icons, one of the graphic COB modules fits better.
What is the operating temperature of the 40x4?
Operating -20 to +70 degree and storage -30 to +80 degree, matching the rest of the character range.
Can the 40x4 backlight be matched to an existing panel colour?
White and yellow LED backlights are stocked, and other colours and voltages can be built to order so a replacement panel matches the look of the equipment it goes into.
A 40x4 needs two controllers and two enable lines, so its pinout differs from every other size — see the Character LCD Pinout Guide for the complete 18-pin table.
