DLO2416 Ver la hoja de datos (PDF) - Infineon Technologies
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DLO2416
Infineon Technologies
DLO2416 Datasheet PDF : 7 Pages
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Design Considerations
For details on design and applications of the DLX2416 using
standard bus configurations in multiple display systems, or
parallel I/O devices, such as the 8255 with an 8080 or memory
mapped addressing on processors such as the 8080, Z80,
6502, or 6800, refer to Appnote 15 in the current Siemens
Optoelectronics Data Book.
Electrical and Mechanical Considerations
Voltage Transient Suppression
We recommend that the same power supply be used for the
display and the components that interface with the display to
avoid logic inputs higher than VCC. Additionally, the LEDs may
cause transients in the power supply line while they change
display states. The common practice is to place .01 mF capac-
itors close to the displays across VCC and GND, one for each
display, and one 10 mF capacitor for every second display.
ESD Protection
The silicon gate CMOS IC of the DLX2416 is quite resistant to
ESD damage and capable of withstanding discharges greater
than 2 KV. However, take all the standard precautions, normal
for CMOS components. These include properly grounding per-
sonnel, tools, tables, and transport carriers that come in con-
tact 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 DLX2416 can be hand soldered with SN63 solder using a
grounded iron set to 260°C.
Wave soldering is also possible following these conditions:
Preheat that does not exceed 93°C on the solder side of the PC
board or a package surface temperature of 85°C. Water solu-
ble organic acid flux (except 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 3.0 sec. Exposure to the wave should not exceed tem-
peratures above 260°C for five seconds at 0.063" 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 accept-
able. Do not use commercial dishwasher detergents.
For faster cleaning, solvents may be used. Carefully select any
solvent as some may chemically attack the nylon package.
Maximum exposure should not exceed two minutes at elevated
temperatures. Acceptable solvents are TF (trichorotribluore-
thane), TA, 111 Trichloroethane, and unheated acetone.
Note:
Acceptable commercial solvents are: Basic TF, Arklone,
P. Genesolv, D. Genesolv DA, Blaco-Tron TF, Blaco-Tron TA,
and Freon TA.
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 manu-
facturers are: Allied Chemical Corportation, Specialty Chemical
Division, Morristown, NJ; Baron-Blakeslee, Chicago, IL; Dow
Chemical, Midland, MI; E.I. DuPont de Nemours & Co., Wilm-
ington, DE.
For further information refer to Siemens Appnotes 18 and 19.
An alternative to soldering and cleaning the display modules
is to use sockets. Standard pin DIP sockets .600" wide with
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., French-
town, NJ; Garry Manufacturing, New Brunswich, NJ; Robin-
son-Nugent, New Albany, IN; and Samtec Electronic
Hardware, New Albany, IN.
For further information refer to Siemens Appnote 22.
Optical Considerations
The 0.200" high characters of the DLX2416 gives readability
up to eight feet. Proper filter selection enhances readability
over this distance.
Filters enhance the contrast ratio between a lit LED and the
character background intensifying the discrimination of differ-
ent 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. Plastic band-pass filters are an inexpensive and
effective way to strengthen contrast ratios.
The DLR2416 is a standard red display and should be
matched with long wavelength pass filter in the 600 nm to
620 nm range. The DLO2416 is a high efficiency red display
and should be matched with a long wavelength pass filter in
the 470 nm to 590 range. The DLG2416 should be matched
with a yellow-green band-pass filter that peaks at 565 nm. For
displays of multiple colors, neutral density gray filters offer
the best compromise.
Additional contrast enhancement is gained by shading the
displays. 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 over-
heat the plastic filter by allowing for proper air flow.
Optimal filter enhancements are gained by using circular
polarized, anti-reflective, band-pass filters. Circular polariz-
ing further enhances contrast by reducing the light that trav-
els through the filter and relfects 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 Homalite, Wilmington, DE; 3M Company, Visual
Products Division, St. Paul, MN; Polaroid Corporation, Polar-
izer 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 manufac-
turers are: R.M.F. Products, Batavia, IL; Nobex Components,
Griffith Plastic Corp., Burlingame, CA; Photo Chemical Prod-
ucts of California, Santa Monica, CA; .E.E.-Atlas, Van Nuys,
CA.
Refer to Siemens Appnote 23 for further information.
DLR/DLO/DLG2416
5–6
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