Datasheet

SLR2016, SLO2016, SLG2016, SLY2016, SCD5584A
2006-01-23 8
Design Considerations
For details on design and applications of the SLX2016 in multiple
display systems, refer to Appnote 15 at www.osram-os.com
Electrical & Mechanical Considerations
Voltage Transient Suppression
We recommend that the same power supply be used for the dis-
play and the components that interface with the display to avoid
logic inputs higher than V
CC
. Additionally, the LEDs may cause
transients in the power supply line while they change display
states. The common practice is to place 0.01 mF capacitors close
to the displays across V
CC
and GND, one for each display, and one
10 µF capacitor for every second display.
ESD Protection
The CMOS IC of the SLX2016 is resistant to ESD damage and
capable of withstanding discharges less than 2.0 kV. However,
take all the standard precautions, normal for CMOS components.
These include properly grounding personnel, tools, tables, and
transport carriers that come in contact with unshielded parts. If
these conditions are not, or cannot be met, keep the leads of the
device shorted together or the parts in anti-static packaging.
Soldering Considerations
The SLX2016 can be hand soldered using a grounded iron set to
260°C.
The display is compatible with leadfree and tin/lead solder. Wave
soldering is also possible following these conditions. Preheat does
not exceed 93°C on the solder side of the PC board or a package
surface temperature of 85°C. Water soluble organic acid flux (ex-
cept carboxylic acid) or resin-based RMA flux without alcohol can
be used.
Wave temperature of 245°C +/-5°C with a dwell between 1.5 sec. to
3 sec. Exposure to the wave should not exceed temperatures
above 260°C for five seconds at 0.063 inches below the seating
plane. The packages should not be immersed in the wave.
Post Solder Cleaning Procedures
The least offensive cleaning solution is hot D.I. water (60 °C) for
less than 15 minutes. Addition of mild saponifiers is acceptable. Do
not use commercial dishwasher detergents.
For faster cleaning, solvents may be used. Carefully select any sol-
vent as some may chemically attack the nylon package. Maximum
exposure should not exceed two minutes at elevated tempera-
tures. Acceptable solvents are TF (trichorotrifluorethane), TA, 111
Trichloroethane, and unheated acetone.
Note:
Acceptable commercial solvents are: Basic TF, Arklone,
P. Genesolv, D. Genesolv DA, Blaco-Tron TF and
Blaco-Tron TA .
Unacceptable solvents contain alcohol, methanol, methylene chlo-
ride, ethanol, TP35, TCM, TMC, TMS+, TE, or TES. Since many com-
mercial mixtures exist, contact a solvent vendor for chemical
composition information. Some major solvent manufacturers are:
Allied Chemical Corporation, Specialty Chemical Division, Morris-
town, NJ; Baron-Blakeslee, Chicago, IL; Dow Chemical, Midland, MI;
E.I. DuPont de Nemours & Co., Wilmington, 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. Standard pin DIP sockets 7.62 mm (0.300") wide with
2.54 mm (0.100") centers work well for single displays. Multiple
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 Hardware, New Albany, IN.
For further information refer to Appnote 22 at www.osram-os.com
Optical Considerations
The 4.72 mm (0.180") high characters of the SLX2016 gives
readability up to eight feet. Proper filter selection enhances read-
ability over this distance.
Filters enhance the contrast ratio between a lit LED and the character
background intensifying the discrimination of different characters.The
only limitation is cost. Take into consideration the ambient lighting envi-
ronment 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 SLR2016 is a standard red display
and should be matched with long wavelength pass filter in the
600 nm to 620 nm range.
The SLO2016 is a super-red display and should be matched with a
long wavelength pass filter in the 470 nm to 590 nm range. The
SLG/SLY2016 should be matched with a yellow-green band-pass fil-
ter that peaks at 565 nm. For displays of multiple colors, neutral den-
sity gray filters offer the best compromise.
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 polar-
ized, anti-reflective, band-pass filters. 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.
Refer to Appnote 23 at www.osram-os.com for further information.