HDSP-5538 Avago Technologies US Inc., HDSP-5538 Datasheet - Page 8

• Manufacturer Part Number: HDSP-5538
• Description: DISPLAY 7SEGMENT HER CC 0.56"
• Manufacturer: Avago Technologies US Inc.
• Type: Moduler

Specifications of HDSP-5538

• Display Type: 7-Segment
• Common Pin: Common Cathode
• Number Of Digits/alpha: +/-1 (overflow)
• Size / Dimension: 0.67" L x 0.49" W x 0.31" H (17.02mm x 12.57mm x 8.00mm)
• Digit/alpha Size: 0.56" (14.22mm)
• Color: Red
• Voltage - Forward (vf) Typ: 2.6V
• Current - Test: 20mA
• Millicandela Rating: 4.8mcd
• Wavelength - Peak: 635nm
• Power Dissipation (max): 105mW
• Package / Case: 10-DIP (0.600", 15.24mm), 9 Leads
• Number Of Digits: 1
• Character Size: 14.1 mm
• Illumination Color: High Efficiency Red
• Wavelength: 635 nm
• Operating Voltage: 2.6 V
• Operating Current: 40 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Luminous Intensity: 4800 ucd
• Package Type: DIP
• Product Length (mm): 17.1mm
• Product Height (mm): 8mm
• Product Depth (mm): 12.4mm
• Character Displayed: Numeric
• Emitting Color: Hi-Eff. Red
• Forward Voltage: 3.5V
• Forward Current: 40mA
• Dominant Wave Length: 636nm
• Power Dissipation: 105mW
• Total Thickness: 8mm
• Reverse Voltage: 5V
• Mounting: Through Hole
• Operating Temperature Classification: Industrial
• Pin Count: 10
• Configuration: Common Cathode
• Number Of Elements: 5
• Peak Wavelength: 635nm
• Reverse Current: 100uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

dc current (I
Figure 2 presents the maximum
allowed dc current vs. ambient
temperature. Figure 1 is based on
the principle that the peak junc-
tion temperature for pulsed
operation at a specified peak
current, pulse duration and
refresh rate should be the same
as the junction temperature at
maximum DC operation. Refresh
rates of 1 kHz or faster minimize
the pulsed junction heating effect
of the device resulting in the
maximum possible time average
luminous intensity.
The time average luminous inten-
sity can be calculated knowing
the average forward current and
relative efficiency characteristic,
luminous intensity for a device
case temperature of 25 C, I
(25 C), is calculated as follows:
I
Example: For HDSP-4030 series
For DF = 1/5:
I
The time average luminous inten-
sity may be adjusted for operat-
ing junction temperature by the
following exponential equation:
I
where T
8
V
V
V
|PEAK
|PEAK
(25 C) =
(25 ) =
(T
-4030/-4130/
-553x/-3900
-5730/-4200
J
) = I
Device
, of Figure 3. Time average
= 1.00 at I
= 4.5 mcd/segment
J
[
= T
[
20 mA
V
–––––
20 mA
20 mA
––––––
I
AVG
(25 C) e
PEAK
A
+ P
]
[
]
MAX/I
|PEAK
PEAK
D
[1.00][4.5 mcd]
[k(T
• R
-0.0131/ C
-0.0112/ C
] [I
= 100 mA.
J
DC
V DATA SHEET
+ 25 C)]
J-A
K
MAX).
V
]
Mechanical
These devices are constructed
utilizing a lead frame in a
standard DIP package. The LED
dice are attached directly to the
lead frame. Therefore, the
cathode leads are the direct
thermal and mechanical stress
paths to the LED dice. The
absolute maximum allowed
junction temperature, T
105 C. The maximum power
ratings have been established so
that the worst case V
not exceed this limit.
Worst case thermal resistance
pin-to-ambient is 400 C/W/Seg
when these devices are soldered
into minimum trace width PC
boards. When installed in a PC
board that provides R
than 400 C/W/Seg these displays
may be operated at higher
average currents as shown in
Figure 2.
Optical
The radiation pattern for these
devices is approximately Lam-
bertian. The luminous sterance
may be calculated using one of
the two following formulas.
-553x/-5730
-3900/-4200
L
Device
-4030
-4130
V
(footlamberts) = –––––––
L
V
(cd/m
Area/Seg. Area/Seg.
mm
14.9
2.5
4.4
8.8
2
) = ––––––
2
F
device does
PIN-A
J
I
A(m
A(ft
V
I
MAX, is
(cd)
V
0.0039
0.0068
0.0137
0.0231
(cd)
in
less
2
2
)
)
2
Contrast Enhancement
The objective of contrast enhance-
ment is to optimize display
readability. Adequate contrast
enhancement can be achieved in
indoor applications through
luminous contrast techniques.
Luminous contrast is the
observed brightness of the
illuminated segment compared to
the brightness of the surround.
Appropriate wavelength filters
maximize luminous contrast by
reducing the amount of light
reflected from the area around
the display while transmitting
most of the light emitted by the
segment. These filters are
described further in Application
Note 1015.
Chrominance contrast can further
improve display readability.
Chrominance contrast refers to
the color difference between the
illuminated segment and the
surrounding area. These displays
are assembled with a gray package
and untinted encapsulating epoxy
in the segments to improve
chrominance contrast of the ON
segments. Additional contrast
enhancement in bright ambients
may be achieved by using a
neutral density gray filter such as
Panelgraphic Chromafilter Gray
10, or 3M Light Control Film
(louvered film).