New 3.3V 20×4 display with DOUBLE HEIGHT characters

MMS Electronics Ltd has available an exceptionally versatile line of alphanumeric and graphic displays for use in industrial and commercial applications. The latest addition to the 1×8, 2×16 and 3×16 popular DOG display family is the new 4×20 (line x char) EA DOGM204-A high-contrast easy-to-read STN and FSTN display. Double height character mode can be selected for the display to function as a 2×20 or 3×20 (line x char.

Supply voltage +3.3V without need for a negative voltage. Current requirement only 250µA (without use of the LED backlight) the display could be battery powered making it ideal for handheld applications.

The integrated SSD1803 offers 4 bit, 8 bit, 4-wire SPI or 2-wire I²C interface. Can be used in bottom or top view direction.

Selection of 3 different fonts: Cyrillic, English-Japanese and European. Displays with white background FSTN technology are readable without backlight. The display and backlights can be ordered separately to create 12 different combinations. 3 different LED backlights are available: white, amber and a dual green/red. The dual colour backlight is ideal for applications where a green (normal) or red (warning) status indication is required.


Download from the DOG-simulator and experiment with all possible combinations. Temperature range -20°C to +70°C.

Without a backlight the displays are only 2mm thick and 5.8 mm including the LED backlight. Module size: 66x39mm with view area: 63x26mm.

The display can be soldered directly into the PCB or plugged into a 2.54 mm pitch socket. No need for extra screws, spacers or connecting leads.

A simulator tool and USB test board EA 9780-3USB is available to help with development. Without any programming the display is shown on the Windows™ desktop and powered via USB. Any text typed in the editor is displayed on the display. The EA 9780-3USB test board can be used with all other alphanumeric and graphic DOG displays. In graphic mode bitmaps dragged into the simulator tool are also shown on a graphic display.

A memory stick EA USBSTICK-FONT has fonts available for the graphic displays. The font software can generate Cyrillic, Greek and Arabic fonts. Windows™ fonts are also easily imported. The preview function shows the size and style and when the EA 9780-3USB test board is connected characters are also shown on the display. The software generates headers to include in the source code.

MMS_EA 9780

In the EA DOG display series MMS Electronics are a further 11 display sizes available starting from 1.5” to 3.9” with 4 bit, 8bit, SPI and I²C interface. See for other sizes.

MMS Electronics Ltd is an authorised distributor for Electronic Assembly Gmbh, IcNexus, Storm keypads, Smartec sensor and Excelera frequency products.

Display products include: Dot matrix LCD, TFT, OLED, ePAPER modules, DOG chip-on-glass, eDIP intelligent displays, Windows, Linux and Android OS displays with I2C, serial and USB interface, stylish display bezels, serial and USB interface boards, analogue and resistive touch-screens and keypads.

Please contact MMS Electronics Ltd with your display or sensor enquiries.

Full part numbers of the displays listed in this article:

Untitled5EA DOGM204W-A
EA LED66x40-W
EA LED66x40-A
EA LED66x40-GR
EA 9780-3USB

MMS Electronics Ltd
Tel 01943 877668

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