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參數資料
| 型號： | SCF5742 |
| 元件分類： | 顯示用LED |
| 英文描述： | 5X7 DOT MATRIX DISPLAY, SUPER RED, 6.86 mm |
| 封裝： | ROHS COMPLIANT, PLASTIC, DIP-22 |
| 文件頁數： | 3/15頁 |
| 文件大小： | 683K |
| 代理商： | SCF5742 |
SCF5740, SCF5742, SCF5744
2006-01-23
11
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 choos-
ing solvents as some may chemically attack the nylon package. 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, 14 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 6.86 mm (0.270") high character of the SCF574X gives read-
ability 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 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 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
super-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 efficiency green display and should be used
with long wavelength pass filter that peaks at 565 nm.
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.
Display Interface to Siemens/Intel 8031 Microprocessor (using serial port in mode 0)
IDCD5224
XTAL2
RxD
18
10
19
XTAL1
RST
9
17
P3.7
13
P3.3
P3.4
14
8031
U1
TxD
11
SDCLK
RST
LD
GND
CLKSEL
CLK I/O
CC
V
DATA
GND
CC
V
40
ID
+
0.01 F
TAN
22 F
CC
V
VCC
15
13
19
2
14
10
21
8
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 數位數量: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 |
| SCF-6C28-01-144 | 制造商:CORNING CABLE SYSTEMS 功能描述:SPLICE CLOSURE 144 FIBER WITH TRAYS FOR HEAT SHRINK FUSION NO SPECIAL TOOLS |
| SCF-6C28-02 | 制造商:CORNING CABLE SYSTEMS 功能描述:288-F SPLICE CLOSURE AERIAL, BURIED OR DUCT, W/12 0.2-IN |
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