SCD5580A OSRAM Opto Semiconductors Inc, SCD5580A Datasheet - Page 11

• Manufacturer Part Number: SCD5580A
• Description: DISPLAY 8CHAR .145" 5X5 RED
• Manufacturer: OSRAM Opto Semiconductors Inc
• Series: Intelligent Display®r

Specifications of SCD5580A

• Millicandela Rating: 90µcd
• Size / Dimension: 1.50" L x 0.39" W x 0.20" H (38.10mm x 10.00mm x 5.08mm)
• Color: Red
• Configuration: 5 x 5
• Number Of Digits: 8
• Character Size: 0.145 in
• Illumination Color: High Efficiency Red
• Wavelength: 660 nm
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Luminous Intensity: 90 ucd
• Viewing Area (w X H): 2.54 mm x 3.68 mm
• Display Type: 5 x 7 Dot Matrix
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Forward (vf) Typ: -
• Internal Connection: -
• Lead Free Status / Rohs Status: Details
• Other names: Q68100A0994

Unacceptable solvents contain alcohol, methanol, methylene
chloride, ethanol, TP35, TCM, TMC, TMS+, TE, or TES. Since
many commercial mixtures exist, contact a solvent vendor for
chemical composition information. Some major solvent manufac-
turers are: Allied Chemical Corporation, Specialty Chemical Divi-
sion, Morristown, NJ; Baron-Blakeslee, Chicago, IL; Dow
Chemical, Midland, MI; E.I. DuPont de Nemours & Co., Wilming-
ton, DE.
For further information refer to Appnotes 18 and 19 at
www.osram-os.com
An alternative to soldering and cleaning the display modules is to
use sockets. Naturally, 28 pin DIP sockets 7.62 mm (0.300") wide
with 2.54 mm (0.100") centers work well for single displays. Multi-
ple display assemblies are best handled by longer SIP sockets or
DIP sockets when available for uniform package alignment. Socket
manufacturers are Aries Electronics, Inc., Frenchtown, NJ; Garry
Manufacturing, New Brunswick, NJ; Robinson-Nugent, New
Albany, IN; and Samtec Electronic Hardward, New Albany, IN.
For further information refer to Appnote 22 at www.osram-os.com
Optical Considerations
The 3.68 mm (0.145") high character of the SCD558XA gives
readability up to eight feet. Proper filter selection enhances read-
ability over this distance.
Using filters emphasizes the contrast ratio between a lit LED and
the character background. This will increase the discrimination of
different characters. The only limitation is cost. Take into consider-
ation the ambient lighting environment for the best cost/benefit
ratio for filters.
Incandescent (with almost no green) or fluorescent (with almost no
red) lights do not have the flat spectral response of sunlight. Plas-
tic band-pass filters are an inexpensive and effective way to
strengthen contrast ratios. The SCD558XA are red/super-red dis-
plays and should be matched with long wavelength pass filter in
the 570 nm to 590 nm range. The SCD558XA should be matched
with a yellow-green band-pass filter that peaks at 565 nm. For dis-
plays of multiple colors, neutral density grey filters offer the best
compromise.
SCD Interface with Siemens/Intel 8031 Microprocessor (using serial port in mode 0)
2006-01-23
V
CC
18
19
9
XTAL2
XTAL1
RST
8031
V
U1
CC
40
SCD5580A, SCD5581A, SCD5582A, SCD5583A, SCD5584A
P3.7
P3.3
P3.4
RxD
TxD
10
11
17
13
14
28
SD
CLK LOAD
1
27
DATA
2
V
CC
23
V
6
CC
Master
20
SCD
9
19
11
Additional contrast enhancement is gained by shading the dis-
plays. Plastic band-pass filters with built-in louvers offer the next
step up in contrast improvement. Plastic filters can be improved
further with anti-reflective coatings to reduce glare. The trade-off is
fuzzy characters. Mounting the filters close to the display reduces
this effect. Take care not to overheat the plastic filter by allowing for
proper air flow.
Optimal filter enhancements are gained by using circular polarized,
anti-reflective, band-pass filters. The circular polarizing further
enhances contrast by reducing the light that travels through the fil-
ter and reflects back off the display to less than 1%.
Several filter manufacturers supply quality filter materials. Some of
them are: Panelgraphic Corporation, W. Caldwell, NJ; SGL Homa-
lite, Wilmington, DE; 3M Company, Visual Products Division, St.
Paul, MN; Polaroid Corporation, Polarizer Division, Cambridge,
MA; Marks Polarized Corporation, Deer Park, NY, Hoya Optics,
Inc., Fremont, CA.
One last note on mounting filters: recessing displays and bezel
assemblies is an inexpensive way to provide a shading effect in
overhead lighting situations. Several Bezel manufacturers are:
R.M.F. Products, Batavia, IL; Nobex Components, Griffith Plastic
Corp., Burlingame, CA; Photo Chemical Products of California,
Santa Monica, CA; I.E.E.–Atlas, Van Nuys, CA.
Microprocessor Interface
The microprocessor interface is through the serial port, SPI port or
one out of eight data bits on the eight bit parallel port and also con-
trol lines SDCLK and LOAD.
Power Up Sequence
Upon power up display will come on at random. Thus the display
should be reset at power-up. The reset will set the Address Regis-
ter to Digit 0, User RAM is set to 0 (display blank) the Control Word
is set to 0 (100% brightness with Lamp Test off) and the internal
counters are reset.
16
13
14
15
28
SD
CLK
1
27
DATA
LOAD
2
23
6
20
Slave
SCD
9
19
16
13
15
14
+
22 µF
TAN
0.01 µF
IDCD5221