EADOGM132-5

Page 2

ELECTRONIC ASSEMBLY reserves

the right to change specifications

without prior notice. Printing and

typographical

errors

reserved.

EA DOGM132

The EA DOGM132, a 132x32-pixel graphics display, is a new addition to ELECTRONIC ASSEMBLY’s EA DOGM

series. It, too, has pins that allow it to be mounted quickly and easily. 6 different optional LED backlights are available.

These can be combined with 5 different display technologies, making it possible to have up to around 20 different designs.

Designed for compact, handheld devices, this modern LCD series offers a number of benefits with and without

backlighting:

* Extremely compact (55x31 mm) with a large viewing area of 51x15 mm

* Super-flat: 2.0 mm without backlight module, and only 5.8 mm with a b./l. module mounted

* Serial SPI interface (4-wire)

* Single supply +2.4 V or +3.3 V

* Typical power consumption of only 140µA in full operation (white LED backlight from 5mA)

* Easily mounted by soldering

* Wide range of design variants orderable as single units

* Backlighting color changes possible

CONTRAST ADJUSTMENT

The contrast can be set by means of a command for all the displays in the EA DOGM series. The contrast setting of

the display must be set once by the software, and is then kept constant throughout the entire operating temperature

range (-20..+70°C), thanks to the integrated temperature compensation.

LED BACKLIGHT

6 different variants are available for individual backlighting: white,

yellow/green, blue, red, amber and a full-color version.

There are 2 separate LED paths available for each monochrome

backlight that can be switched in parallel or in series to suit the system

voltage. This means that most backlights can be run at either 3.3 V or

5 V.

To operate the backlight, we recommend a current source (e.g.

CAT4238TD) or an external series resistor to limit the current. This

can be calculated from R=U/I; you can find the values in the table on

the right. To prolong the life of the backlights, we recommend that you

use a current source.

The operating life of the yellow/green, red and amber backlights is

100,000 hours. The life of the white and blue backlights is considerably

shorter. We recommend that you dim these or switch them off

whenever possible.

Important: Never connect the backlight LEDs directly to a 5 V/

3.3 V supply as this will immediately destroy the LEDs. Always

use a current source. Please note that derating applies at

temperatures exceeding +25°C.

ASSEMBLING

First, clip the display and backlight modules together by gently pushing

the display pins through the corresponding holes on the backlight

module. Then insert the entire module into the socket, or into the

soldering holes on the pcb. The backlight pins (the 2 rows with 3 pins

at the bottom) must be soldered on the top side as well to ensure good

contact between the modules.

Important: The display has a protective film on the top and/or the bottom, and there is also one on the

backlight. These must be removed.

Make sure that neither display nor backlight will never come into contact with any kind of liquid like

Fluxer, Cleaner, Water.

yellow/green

EA LED55x31-G

Forwar

voltage

Current

max.

Limiting resistor

@ 3,3 V

@ 5 V

Connected in parallel

2,2 V

80 mA

14 ohm

35 ohm

Connected in series

4,4 V

40 mA

-

15 ohm

white

EA LED55x31-W

Forwar

voltage

Current

max.

Limiting resistor

@ 3,3 V

@ 5 V

Connected in parallel

3,2 V

60 mA

1,6 ohm

30 ohm

Connected in series

6,4 V

30 mA

-

-

blue

EA LED55x31-B

Forwar

voltage

Current

max.

Limiting resistor

@ 3,3 V

@ 5 V

Connected in parallel

3,2 V

60 mA

1,6 ohm

30 ohm

Connected in series

6,4 V

30 mA

-

-

amber

EA LED55x31-A

Forwar

voltage

Current

max.

Limiting resistor

@ 3,3 V

@ 5 V

Connected in parallel

2,4 V

80 mA

11 ohm

32 ohm

Connected in series

4,8 V

40 mA

-

5 ohm

red

EA LED55x31-R

Forwar

voltage

Current

max.

Limiting resistor

@ 3,3 V

@ 5 V

Connected in parallel

2,1 V

80 mA

15 ohm

36 ohm

Connected in series

4,2 V

40 mA

-

20 ohm

Full color

EA LED55x31-RGB

Forwar

voltage

Current

max.

Limiting resistor

@3,3 V

@ 5 V

Connected in parallel

4 V

125 mA

-

3x24 ohm