HDSP-2533 Avago Technologies US Inc., HDSP-2533 Datasheet - Page 13

• Manufacturer Part Number: HDSP-2533
• Description: LED DISPLAY 5X7 8CHAR 5MM GREEN
• Manufacturer: Avago Technologies US Inc.
• Series: HDSP-253xr

Specifications of HDSP-2533

• Display Type: Alphanumeric
• Common Pin: *
• Package / Case: 28-DIP
• Color: Green
• Size / Dimension: 1.69" x .45" (42.9mm x 11.4mm)
• Number Of Digits/alpha: 8
• Digit/alpha Size: 0.20" (5mm)
• Number Of Digits: 8
• Character Size: 2.54 mm x 4.57 mm
• Illumination Color: Green
• Wavelength: 574 nm
• Operating Voltage: 5 V
• Operating Current: 370 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Luminous Intensity: 7.5 ucd
• Viewing Area (w X H): 40.06 mm x 4.57 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 516-1169-5

Figure 8. Proper method to manually insert a display.
Thermal Considerations
The HDSP-253X can operate from -40°C to +85°C. The
display’s low thermal resistance allows heat to flow from
the CMOS IC to the 24 pack­age pins. Typically, this heat
is conducted through the printed circuit board traces to
free air. For most applications, no additional heatsink­ing
is needed. Illuminating all 280 LEDs simultaneously at full
brightness is not recommended for continuous operation.
However, all 280 LEDs can be illuminated simultaneously
at full brightness for 10 seconds at 25°C as a lamp test.
The IC has a maximum allowable junction temperature of
150°C. The IC junction temperature can be calculated with
the following equation:
T
T
T
P
Rq
display pack­age and printed circuit board to the ambient.
A typical value for Rq
a display mounted in a sock­et and covered with a plastic
filter. The sock­et is soldered to a 0.062 in. thick­ printed
circuit board with 0.020 in. wide one-ounce copper
traces.
13
A
J
J
D
MAX = T
MAX is the maximum allowable IC junction temperature.
is the ambient temperature surrounding the display.
is the power dissipated by the IC.
J-A
is the thermal resistance from the IC through the
A
+ (P
D
x Rq
J-A
J-A
is 39°C/W. This value is typical for
)
Figure 9. Improper method to manually insert a display.
P
P
V
V
I
number of on-pixels.
For AlGaAs
I
I
For the other colors
I
I
I
character.
I
character.
T
B is the percent brightness level.
N is the number of characters illuminated.
Operation in high temperature ambients may require
power derating or heatsink­ing. Figure 10 shows how to
derate the power for an HDSP-253X. You can reduce the
power by tighter supply voltage regulation or lowering
the brightness level.
DD
DD
DD
DD
DD
DD
DD
J
D
D
DD
DD
is the IC junction temperature.
can be calculated as follows:
= V
changes with V
(#) = (83.8 x V
(V) = (63 x V
(#) = (75.4 x V
(V) = (54 x V
(#) is the supply current using “#” as the displayed
(V) is the supply current using “V” as the displayed
is the supply voltage and I
can vary from 4.5 V to 5.5 V.
DD
x I
DD
DD
DD
DD
DD
-0.79 x T
-0.6 x T
DD
-0.35 x T
-0.28 x T
, temperature, brightness level, and
J
) x B x N/8
J
) x B x N/8
J
J
) x B x N/8
) x B x N/8
DD
is the supply current.