Page 1
)
.
Tolerance: XXX±.01 (.254)
Dimensions in inches (mm)
RED
DLR1414
FEATURES
• Dot Matrix Replacement for DL1414T
• 0.145" High, Dot Matrix Character
• 128 Special ASCII Characters for English,
German, Italian, Swedish, Danish, and Norwegian Languages
• Wide Viewing Angle: X Axis ± 50 ° , Y Axis ± 75 °
• Close Vertical Row Spacing, 0.800" Centers
• Fast Access Time, 110 ns at 25 ° C
• Compact Size for Hand Held Equipment
• Built- in Memory
• Built-in Character Generator
• Built-in Multiplex and LED Drive Circuitry
• Direct Access to Each Digit Independently
and Asynchronously
• TTL Compatible, 5 Volt Power
• Low Power Consumption, 20 mA per Character Typical
• Intensity Coded for Display Uniformity
• Extended Operating Temperature Range:
–40 ° C to +85 ° C
• End Stackable, 4-Character Package
HIGH EFFICIENCY RED
GREEN
DLO1414
DLG1414
.145" 4-character 5 x 7 Dot Matrix
Alphanumeric Intelligent Display
with Memory/Decoder/Driver
0200 (.51)
.0220
(.56)
Part Number
Pin Indicator
.050 (1.27) 4 pl.
.160±.020
(4.06±.51)
.095 (2.41)
ref.
DESCRIPTION
The DLR/DLO/DLG1414 is a four digit 5x7 dot matrix display module with a
built-in CMOS integrated circuit. This display is a drop-in dot matrix replacement for the DL1414T with segmented characters.
The integrated circuit contains memory, ASCII ROM decoder, multiplex circuitry and drivers. Data entry is asynchronous and random. A display system
can be built using any number of DLX1414s since each character in any
DLX1414 can be addressed independently and will continue to display the
character last stored until replaced by another.
System interconnection is very straightforward. The least significant two
address bits (A0, A1) are normally connected to the like named inputs of all
displays in the system. Data lines are connected to all DLX1414s directly
and in parallel as is the write line (WR
write only memory.
The DLX1414 has several features superior to competitive devices. The
character set consists of 128 special ASCII characters for English, German,
Italian, Swedish, Danish, and Norwegian.
See Appnotes 18, 19, 22, and 23 for additional information.
.1750
(4.45)
.700 max.
(17.78)
Luminous
Intensity
Code
DLX 1414
SIEMENS YYWW
.0920
(2.34)
.1440
(3.66)
.010 (.25) 4 pl.
.240 (6.10)
Z
EIA Date Code
.100 (2.54) 10 pl.
.018 (.46) 12 pl.
at Seating Plane
). The display then will behave as a
.240
(6.10)
ref.
.800
(20.32)
max.
.070 (1.78) ± .003 (.08) 4 pl.
.210
(5.33)
.600±.020
(15.24±.51)
.012 (.30)
± .002 (.05
12 pl.
2–1
Page 2
A
D
V
V
V
V
V
V
Maximum Ratings
DC Supply Voltage....................... –0.5 to +7.0 Vdc
Input Voltage Levels Relative
to GND (all inputs).............–0.5 to V
Operating Temperature..................–40 °
Storage Temperature....................–40 °
+0.5 Vdc
CC
C to +85 ° C
C to +100 ° C
Maximum Solder Temperature........063" (1.59 mm)
below Seating Plane, t<5 sec....................260 °
Relative Humidity at 85 °
C ................................85%
C
Optical Characteristics
Spectral Peak Wavelength
Red...................................................660 nm typ.
High Efficiency Red (HER) ...............630 nm typ.
Green................................................565 nm typ.
Viewing Angle (off normal axis)
Horizontal..................................................... ±
50 °
Vertical......................................................... ± 75 °
Character Height...........................................0.145"
Time Averaged Luminous Intensity
(100% brightness, V
CC
=5 V)
Red............................................50 µ
HER............................................60 µ
Green.........................................70 µ
1
cd/LED typ.
cd/LED typ.
cd/LED typ.
LED to LED Intensity Matching ...........1.8:1.0 max.
LED to LED Hue Matching at V
(Green only) ..................................... ±
Note 1: Peak luminous intensity values can be calculated
by multiplying these values by 7.
CC
=5 V
2 nm max.
Figure 1. Top view
12 11 10 9 8 7
digit digit digit digit
3 2 1 0
1 2 3 4 5 6
Pin Function Pin Function
1 D5 Data Input 7 GND
2 D4 Data Input 8 D0 Data Input (LSB)
3WR Write 9 D1 Data Input
4 A1 Digit Select 10 D2 Data Input
5 A0 Digit Select 11 D3 Data Input
6V
CC
Figure 2. Timing characteristics (V
0, A1
T
AS
0-D6
WR
Note: These waveforms are not edge triggered.
12 D6 Data Input (MSB)
=4.5 V)
CC
T
AH
T
T
ACC
T
DS
W
T
DH
2.0
0.8
2.0
0.8
2.0
0.8
DC Characteristics
Parameter
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
I
4 Digits on
CC
20 dots/digit
I
Blank 2.8 4.0 2.3 3.0 2.0 2.5 mA V
CC
I
(all inputs) 30 60 120 25 50 100 20 40 80 mA V
IL
V
2.0 2.0 2.0 VV
IH
V
0.8 0.8 0.8 V V
IL
V
CC
4.5 5.0 5.5 4.5 5.0 5.5 4.5 5.0 5.5 V
–40 ° C +25 ° C +85 ° C
Units Conditions
90 120 80 105 70 95 mA V
=5 V
CC
=WR=5 V,
CC
V
=0 V
IN
=0.8 V, V
IN
=5 V ± 0.5 V
CC
=5 V ± 0.5 V
CC
CC
=5 V
AC Characteristics
Guaranteed Minimum Timing Parameters at V
Parameter Symbol –40 ° C +25 ° C +85 ° C Units
Address Set Up Time T
Address Hold Time T
Write Time T
Data Set Up Time T
Data Hold Time T
Access Time
Note: 1. T
(1)
=Set Up Time + Write Time + Hold Time.
ACC
T
AS
AH
W
DS
DH
ACC
10 10 10 ns
20 30 40 ns
60 70 90 ns
20 30 50 ns
20 30 40 ns
90 110 140 ns
=5.0 V ± 0.5 V
CC
2–2
DLR/DLO/DLG1414
Page 3
Loading Data State Table
A
A1 A0 D6 D5 D4 D3 D2 D1 D0
WR
H previously loaded display G R E Y
L L L H L L L H L HGREE
L LHHL HL HL HGRUE
L HLHL L HHL LGLUE
L HHHLLLLHLBLUE
L LHHLLLHLHBLEE
L LL HL HL HHHBLEW
L XX see character code see character set
X=don’t care
Digit
3210
Figure 3. Typical interconnection for 32 characters
V+
V-
D31 D28 D27 D24 D23 D20 D19 D16 D15 D12 D11 D8 D7 D4 D3 D0
WR
D0-D6
A0-A1
D0-D6 7
DATA
DDRESS
A0 A1 2
ADDRESS A2
WRITE
A3
A4
7
6
A
5
B
4
C
3
G
2
1
0
74138
2–3
DLR/DLO/DLG1414
Page 4
Figure 4. Block diagram
W
A
A
1
.
Row Control Logic
&
Row Drivers
Rows 0 to 6
Display
3 2 1 0
Columns 0 to 19
RAM Read Logic
D
6
D
5
D
4
D
3
D
2
D
1
D
R
0
1
4 X 7 bit
0
Write
Address
Decoder
Character Set
D0
D1
ASCII
CODE
D2
D6 D5 D4 HEX
D3
OSC
RAM
Memory
0
0
0
0
0
128
÷
Counter
7 Bit ASCII Code
0
1
1
0
0
0
0
0
2
1
÷
7
Counter
1
1
0
0
3
Timing and Control Logic
Row Decoder
ROM
128 X 35 Bit
Column Data
ASCII
Character
Latches
Decode
Column Decoder
4480 bits
1
0
1
0
1
0
1
0
1
0
0
0
1
1
0
0
5
4
1
1
1
1
0
0
7
6
0
0
0
0
1
1
9
8
1
1
0
0
1
1
B
A
0
0
1
1
1
1
D
C
Column Enable
Latches and
Column Drivers
1
0
1
1
1
1
1
1
F
E
0
0
0
0
0
0
1
1
0
1
0
2
0
1
1
3
1
0
0
4
1
0
1
5
1
1
0
6
1
1
1
7
. High=1 level. 2. Low=0 level. 3. Upon power up, device will initialize in a random state
2–4
DLR/DLO/DLG1414
Page 5
Design Considerations
For details on design and applications of the DLX1414 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, 8748, or 6800, refer to Appnote 15 in the current
Siemens Optoelectronic Data Book.
Electrical & Mechanical Considerations
V oltage Transient Suppression
We strongly 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 V
. Additionally, the
CC
LEDs may cause transients in the power supply line while
they change display states. The common practice is to place
.01 mF capacitors close to the displays across V
and GND,
CC
one for each display, and one 10 mF capacitor for every second display.
ESD Protection
The metal gate CMOS IC of the DLX1414 is extremely
immune to ESD damage. However , users of these devices are
encouraged to 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. Where 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 DLX1414 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 °
PC board or a package surface temperature of 85 °
C on the solder side of the
C. Water
soluble organic acid flux (except carboxylic acid) or resinbased 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 temperatures 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. Carefully select
solvents as some may chemically attack the nylon package.
Maximum exposure should not exceed two minutes at elevated temperatures. Acceptable solvents are TF (trichlorotrifluorethane), TA, 111 Trichloroethane, and unheated acetone.
Note: Acceptable commercial solvents are: Basic TF, Arklone P,
Genesolve D, Blaco-tron TF, Freon TA, Genesolve DA, and
Blaco-tron 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 manufacturers are: Allied Chemical Corporation, Specialty Chemical 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 current Siemens Optoelectronic Data Book.
An alternative to soldering and cleaning the display modules is
to use sockets. Eighteen pin DIP sockets .600" wide with .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 in the current Siemens Optoelectronic Data Book.
Optical Considerations
The .145" high characters of the DLX1414 gives readability up
to eight feet. The user can build a display that enhances readability over this distance by proper filter selection .
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.
Remember to 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 DLR1414 is a standard red
display and should be matched with long wavelength pass filter in the 600 nm to 620 nm range. For displays of multiple colors, neutral density grey filters offer the best compromise.
The DLO1414 is a high efficiency red display and should be
matched with a long wavelength pass filter in the 570 nm to 590
range. The DLG1414 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 can be 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 car e 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, 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 Siemens Appnote 23 for further information.
DLR/DLO/DLG1414
2–5
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