Datasheet

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EA DOGS164-A
preliminary
EA DOG SERIES
With its EA DOG series, ELECTRONIC ASSEMBLY presents the world’s first display series which will
run on 3.3 V systems without auxiliary power.
Unlike normal LCD modules, you order the display and the corresponding backlight separately. This
gives you a wealth of possible combinations.
Designed for compact hand-held devices, this modern LCD range provides a number of real benefits
with or without backlight:
* extremely compact at 40x33 mm at the standard font size of 3.2 mm (4 x 16)
* ultra-flat at 2.0 mm without backlight or 4.6 mm including LED backlight
* SPI interface (2-/3-/4-wire) and I²C (2-wire)
* typical power consumption of only 440µA in full operation (LED white backlight as of 3mA)
* easy installation by simply soldering into the board
* A whole range of design variants can be supplied as of single units
* Changing background color
LED BACKLIGHTS
2 different variants are available for individual
backlighting: monochrome amber and multi-color
green/red/white.
For the amber backlight, 2 separate LED paths
are available, which can be switched in parallel
or in series to ideally match the system voltage.
This means that all the backlights can be run
either at 3.3 V and higher voltages.
Operation of the backlight requires an external
series resistor for current limiting. This can be
calculated by R=U/I; you will find the values in
the table. To improve life time it is recommanded
to use a current source only.
The operating life time of the amber backlight is 100,000 hours, those for the 3-color verision is a bit
shorter (@25°C).
Important: Never operate the backlight directly on a 5 V/3.3V supply, as this can immediately destroy
the LEDs!
INSTALLATION
First, the display and the corresponding backlight are clipped together. The complete unit is then inserted
into a PCB and soldered. Note that the 4 pins for the backlight must also be soldered from the top with
less tin.
Important: There are one or two protective films on the display (top and/or rear side) and one on each
backlight. Those have to be removed during or after production.
amber
EA LED40x33-A
Forward
voltage
Current
max.
Limiting resistor
@3,3V @5V
Connected in parallel 2,1 V 60 mA 20 ohm 48 ohm
Connected in series 4,2 V 30 mA - 27 ohm
green/red/white
EA LED40X33-ERW
Forward
voltage
Current
max.
Limiting resistor
@3,3V @5V
green path 3,0V 45 mA 7 ohm 45 ohm
red path 2,1 V 45 mA 27 ohm 65 ohm
white path 3,0 V 30 mA 10 ohm 67 ohm