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参数资料
| 型号： | PLCD5583 |
| 厂商： | SIEMENS A G |
| 元件分类： | 显示用LED |
| 英文描述： | Low Power 0.145” 8-Character, 5x5 Dot Matrix Parallel Input Alphanumeric Intelligent Display |
| 中文描述： | 5X5 DOT MATRIX DISPLAY, GREEN, 3.68 mm |
| 封装： | PLASTIC, DIP-28 |
| 文件页数： | 12/12页 |
| 文件大小： | 292K |
| 代理商： | PLCD5583 |
2–142
PLCD5580/1/2/3/4
Electrical and Mechanical Considerations
Voltage Transient Suppression
For best results power the display 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 com-
mon practice is to place a parallel combination of a .01
μ
F
and a 22
μ
F capacitor between V
CC
and GND for all display
packages.
ESD Protection
The input protection structure of the PLCD5580/1/2/3/4 pro-
vides significant protection against ESD damage. It is capa-
ble of withstanding discharges greater than 2 KV. 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 pack-
aging.
Soldering
Considerations
THE PLCD5580/1/2/3/4 can be hand soldered with SN63 sol-
der 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
soluble 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
acceptable. Do not use commercial dishwasher detergents.
For faster cleaning, solvents may be used. Exercise care in
choosing solvents as some may chemically attack the nylon
package. Maximum exposure should not exceed two minutes
at elevated temperatures. Acceptable solvents are TF (tri-
chorotrifluorethane), TA, 111 Trichloroethane, and unheated
acetone.
(1)
Note: 1. Acceptable commercial solvents are: Basic TF, Ark-
lone, 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 Corporation, Specialty Chemi-
cal Division, Morristown, 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 in the cur-
rent Siemens Optoelectronic Data Book.
An alternative to soldering and cleaning the display modules
is to use sockets. Naturally, 28 pin DIP sockets .600" wide
with .100" centers work well for single displays. Multiple dis-
play 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 Brunswick, NJ ; Robin-
son-Nugent, New Albany, IN; and Samtec Electronic
Hardward, New Albany, IN.
For further information refer to Appnote 22 in the current Sie-
mens Optoelectronic Data Book.
Optical
Considerations
The .200" high character of the PLCD588X gives readability
up to eight feet. Proper filter selection enhances readability
over this distance.
Using filters emphasizes the contrast ratio between a lit LED
and the character background. This will increase the discrim-
ination of different characters. The only limitation is cost. Take
into consideration 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 PLCD5880/
5882 are red/high efficiency red displays and should be
matched with long wavelength pass filter in the 570 nm to
590 nm range. The PLCD5881/5883/5884 should be
matched with a yellow-green band-pass filter that peaks at
565 nm. For displays of multiple colors, neutral density grey
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. The circular polar-
izing further enhances contrast by reducing the light that
travels through the filter and reflects back off the display to
less than 1%. Selecting the proper intensity of the displays
allows 10,000 foot candle sunlight viewability.
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; I.E.E.-Atlas, Van Nuys,
CA.
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