User manual

Technical data
11
4. Technical data
ValueSpecification
LCD-Term12 LCD-Term15 LCD-Term25 LCD-Term35
Unit
Power supply 3.3 .. 5 V
Power consumption (min.) 38 mW
Power consumption (max.) 160 mW
Operating temperature -30 .. +85 °C
Resolution 128 x 64 Pixel
Width 25 29.4 43.2 53 mm
Length 49.1 59.3 74.4 94.8 mm
Height 5.5 6.0 6.8 7.5 mm
Pixel array 26.8 x 12.0 35.8 x 19.8 47.3 x 26.2 66.5 x 33.2 mm
2
IO pins 5 8 12 14 
Table4.1.Characteristics
A more detailed listing of the energy requirements depending on the backlight volume is
presented in Table4.2, “Power consumption”.
Backlight
Mode of operation
off 25% 50% 100% Unit
idle
a
7.6 13.4 18.0 26.6 mA
full load
a
13.1 18.5 23.1 31.5 mA
a
LCD-Term35: V=4.9V; baud=115200; contrast setting=35
Table4.2.Power consumption
4.1. Power supply
A few things should be kept in mind regarding the power supply. When connecting the
USB device port, LCD-Term uses the +5V line from the connected host. In this case, it
also generates the +3.3V from that source.
Caution
None of the pins described as 5V shall be connected to a second power source
when USB is used!
If USB is not used - neither to supply power nor as communication port - one is free to
use any 5V pin as power input.
Alternatively, power can also be supplied via one of the 3.3V pins. Using a 3.3V pin as
power source does not collide with any of the prior options. However, combining the 5V
and 3.3V supply is not recommended.