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參數(shù)資料
| 型號(hào)： | SCF5740 |
| 廠商： | SIEMENS A G |
| 元件分類： | 顯示用LED |
| 英文描述： | 0.270” 4-Character, 5x7 Dot Matrix Serial Input Dot Addressable Intelligent Display |
| 中文描述： | 5X7 DOT MATRIX DISPLAY, RED, 6.86 mm |
| 封裝： | PLASTIC, DIP-22 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 93K |
| 代理商： | SCF5740 |
2–209
SCF5740/2/4
Post Solder Cleaning Procedures
The least offensive cleaning solution is hot D.I. water (60
°
C)
for less than 15 minutes. Addition of mild saponifers 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. For further information refer to Appnotes 18 and 19
in the current Siemens Optoelectronic Data Book. See App-
note 19, Table 1, “Displays–Group 2” for the SCDV554X.
An alternative to soldering and cleaning the display modules
is to use sockets. Naturally, 14 pin DIP sockets .300" 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 0.270" high character of the SCF574X gives readability
up to five 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 SCF5740 is a
red display and should be used with long wavelength pass
filter having a sharp cut-off in the 600 nm to 620 nm range.
The SCF5742 is a high efficiency red display and should be
used with long wavelength pass filter having a sharp cut-off
in the 570 nm to 600 nm range. The SCF5744 is a high effi-
ciency green display and should be used with long wave-
length pass filter that peaks at 565 nm.
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
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 filter 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 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 shad-
ing effect in overhead lighting situations. Several Bezel man-
ufacturers 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 control 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 Register to Digit 0, User RAM is set to 0 (display
blank) the Control Word is set to 0 (100% brightness) and the
internal counters are reset
Figure 10. Display Interface to Siemens/Intel 8031 Microprocessor (using serial port in mode 0)
V
CC
V
CC
V
CC
U1
8031
9 RST
18
19
XTAL2
XTAL1
40
RXD
TXD
10
11
10
21
8
22
μ
f
TAN
+
.01
μ
f
P3.7 17
P3.3 13
P3.4 14
GND
DATA
V
CC
CLKSEL
CLK I/O
SDCLK
LD
RST
GND
ID
15
13
19
2
14
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SCF5741 | 制造商:OSRAM 功能描述: |
| SCF5742 | 功能描述:LED 顯示器和配件 5x7 Hi-Eff Red 0.27" 4-CHARACTER RoHS:否 制造商:Avago Technologies 顯示器類型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長:628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
| SCF5744 | 功能描述:LED 顯示器和配件 5x7 Hi-Eff Green 0.27" 4-CHARACTER RoHS:否 制造商:Avago Technologies 顯示器類型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長:628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
| SCF62160 | 制造商:CELDUC 制造商全稱:celduc-relais 功能描述:Power Solid State Relay |
| SCF-6C22-01-72 | 制造商:CORNING CABLE SYSTEMS 功能描述:6" dia., 22" length - 72 Fiber Canister Closure |
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