21
FEATURES
Dot Matrix Replacement for DL3416
0.270" 5x7 Dot Matrix Characters
128 Special ASCII Characters for English,
German, Italian, Swedish, Danish, and Norwe-
gian Languages
Wide Viewing Angle: X Axis 50
Maximum,
Y Axis
75
Maximum
Close Vertical Row Spacing, 0.800" Centers
Fast Access Time, 110 ns at 25
C
Full Size Display for Stationary Equipment
Built-in Memory
Built-in Character Generator
Built-in Multiplex and LED Drive Circuitry
Each Character Independently Accessed
TTL Compatible, 5 Volt Power, V
IH
=2.0 V,
V
IL
=0.8 V
Independent Cursor Function
Memory Clear Function
Display Blank Function for Blinking and Dim-
ming
End-Stackable, 4-character Package
Intensity Coded for Display Uniformity
Extended Operating Temperature Range:
40
C to +85
C
Wave Solderable
See Appnotes 18, 19, 22, and 23 for additional
information.
DESCRIPTION
The DLR/DLO/DLG3416 is a four character 5x7 dot matrix display module
with a built-in CMOS integrated circuit. This display is a "drop-in" replace-
ment for the DL3416.
The integrated circuit contains memory, ASCII ROM decoder, multiplexing
circuitry and drivers. Data entry is asynchronous and can be random. A dis-
play system can be built using any number of DLX3416s since each charac-
ter 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. With four chip enables, four displays (16 characters)
can easily be interconnected without a decoder.
Data lines are connected to all DLX3416s directly and in parallel, as is the
write line (WR). The display will then behave as a write-only memory.
The cursor function causes all dots of a character position to illuminate at
half brightness. The cursor is not a character, and when removed the previ-
ously displayed character will reappear.
The DLX3416 has several features superior to competitive devices. True
"blanking" allows the designer to dim the display for more flexibility of dis-
play presentation. Finally the CLR clear function will clear the cursor RAM
and the ASCII character RAM simultaneously.
The character set consists of 128 special ASCII characters for English, Ger-
man, Italian, Swedish, Danish, and Norwegian.
All products are subjected to out-going AQL's of 0.25% for brightness match-
ing, visual alignment and dimensions, 0.065% for electrical and functional.
Dimensions in inches (mm)
.270
(6.86)
.790
(20.07)
.010
(.25)
.600 (15.24)
.020 (.51)
at Seating
Plane
340 (8.64)
.100 (2.54)
.015 (38)
at Seating Plane
.157 (.40)
.007 (.18)
.175
(4.45)
Part
No.
Pin 1
Indicator
EIA Date Code
.160 (4.06)
.020 (.51)
DLX3416
SIEMENS
Z
.145 (3.68)
.015 (.38)
at Seating Plane
YYWW
.260 (6.60)
.007 (.18)
1.300 (33.02) max
.020 (.51) x .012(.30)
Leads 22 pl.
Luminous
Intensity Code
.325
(8.26)
RED
DLR3416
HIGH EFFICIENCY RED
DLO3416
GREEN
DLG3416
.270" 4-character 5 x 7 Dot Matrix
Alphanumeric Intelligent Display
with Memory/Decoder/Drive
22
DLR/DLO/DLG3416
Maximum Ratings
DC Supply Voltage .................... 0.5 V to +7.0 Vdc
Input Voltage, Respect to GND
(all inputs) .......................0.5 V to V
CC
+0.5 Vdc
Operating Temperature .................. -40
C to +85
C
Storage Temperature-.................... 40
C to +100
C
Relative Humidity at 85
C
(non-condensing) .........................................85%
Maximum Solder Temperature,
0.063" (1.59 mm) below
Seating Plane, t<5 sec ............................. 260
C
Optical Characteristics
Spectral Peak Wavelength
Red .................................................. 660 nm typ.
HER .................................................. 630 nm typ.
Green ............................................... 565 nm typ.
Character Height0.270" (6.86 mm)
Time Averaged Luminous Intensity(1)
at V
CC
=5 V
Red ............................................ 60
cd/LED typ.
HER.......................................... 120
cd/LED typ.
Green ....................................... 140
cd/LED typ.
Dot to Dot Intensity Matching
at V
CC
=5 V ....................................... 1.8:1.0 max.
LED to LED Hue Matching
(Green only) at V
CC
=5 V ...................
2 nm max.
Viewing Angle (off normal axis)
Horizontal ...........................................
50
max.
Vertical . .............................................
75
max.
Note 1: Peak luminous intensity values can be calculated
by multiplying these values by 7.
Figure 1. Top view
Figure 2. Timing characteristics, Write Cycle waveforms
Pin
Function
Pin
Function
1
CE1 Chip Enable
12
GND
2
CE2 Chip Enable
13
NC
3
CE3 Chip Enable
14
BL Blanking
4
CE4 Chip Enable
15
NC
5
CLR Clear
16
D0 Data Input
6
V
CC
17
D1 Data Input
7
A0 Digit Select
18
D2 Data Input
8
A1 Digit Select
19
D3 Data Input
9
WR Write
20
D4 Data Input
10
CU Cursor Select
21
D5 Data Input
11
CUE Cursor Select
22
D6 Data Input
22 21 20 1918 17 16 15 14 13 12
1 2 3 4 5 6 7 8 9 10 11
digit 3 digit 2 digit 1 digit 0
Tds
Tdh
TW
Tacc
Tah
Tas
Tceh
Tcuh
Tces
Tcus
Tclrd
2.0 V
0.8 V
CE1, CE2
CE3, C34
CU, CLR
A0, A1
D0-D6
WR
2.0 V
0.8 V
2.0 V
0.8 V
2.0 V
0.8 V
Note: These waveforms are not edge triggered.
DC Characteristics
Parameter
40
C
+25
C
+55
C
Units
Conditions
Min.
Typ.
Max.
Min.
Typ. Max.
Min.
Typ. Max.
I
CC
80 dots on
150
190
135
165
118
150
mA
V
CC
=5 V
I
CC
Cursor
170
140
125
mA
V
CC
=5 V
I
CC
Blank
2.8
4.0
2.3
3.0
2.0
2.5
mA
V
CC
=5 V, BL=0.8 V
I
IL
(all inputs)
30
60
120
25
50
100
20
40
80
A
V
IN
=0.8 V, V
CC
=5 V
V
IH
(all inputs)
2.0
2.0
2.0
V
V
CC
=5 V
V
IL
(all inputs)
0.8
0.8
0.8
V
V
CC
=5 V
V
CC
4.5
5.0
5.5
4.5
5.0
5.5
4.5
5.0
5.5
V
23
DLR/DLO/DLG3416
AC Characteristics
Guaranteed Minimum Timing Parameters at
V
CC
=5.0 V
0.5 V
Note: 1. T
ACC
=Set Up Time + Write Time + Hold Time.
Loading Data
Setting the chip enable (CE1, CE2, CE3, CE4) to their true state will
enable loading. The desired data code (D0-D6) and digit address (A0,
A1) must be held stable during the write cycle for storing new data.
Parameter
Symbol
40
C
+25
C
+85
C
Units
Chip Enable Set Up Time
T
CES
0
0
0
ns
Address Set Up Time
T
AS
10
10
10
ns
Cursor Set Up Time
T
CUS
10
10
10
ns
Chip Enable Hold Time
T
CEH
0
0
0
ns
Address Hold Time
T
AH
20
30
40
ns
Cursor Hold Time
T
CUH
20
30
40
ns
Clear Disable Time
T
CLRD
1
1
1
s
Write Time
T
W
60
70
90
ns
Data Set Up Time
T
DS
20
30
50
ns
Data Hold Time
T
DH
20
30
40
ns
Clear Time
T
CLR
1
1
1
s
Access Time
T
ACC
90
110
140
ns
Data entry may be asynchronous and random. Digit 0
is defined as right hand digit with A1=A2=0.
To clear the entire internal four-digit memory hold the
clear (CLR) low for 1
s. All illuminated dots will be
turned off within one complete display multiplex cycle,
1 msec minimum. The clear function will clear both the
ASCII RAM and the cursor RAM.
Loading Cursor
Setting the chip enables (CE1, CE2, CE3, CE4) and
cursor select (CU) to their true state will enable cursor
loading. A write (WR) pulse will now store or remove a
cursor into the digit location addressed by A0, A1, as
defined in data entry. A cursor will be stored if D0=1
and will removed if D0=0. The cursor (CU) pulse width
should not be less than the write (WR) pulse or errone-
ous data may appear in the display.
If the cursor is not required, the cursor enable signal
(CUE) may be tied low to disable the cursor function.
For a flashing cursor, simply pulse CUE. If the cursor
has been loaded to any or all positions in the display,
then CUE will control whether the cursor(s) or the
characters will appear. CUE does not affect the con-
tents of cursor memory.
Typical Loading Data State Table
X=don't care
Loading Cursor State Table
X=don't care
s
=all dots on
BL
CE1
CE2
CE3
CE4
CUE
CU
WR
CLR
A1
A0
D6
D5
D4
D3
D2
D1
D0
Digit
3
2
1
0
H
X
X
X
X
L
X
H
H
previously loaded display
G
R
E
Y
H
L
X
X
X
L
X
X
H
X
X
X
X
X
X
X
X
X
G
R
E
Y
H
X
L
X
X
L
X
X
H
X
X
X
X
X
X
X
X
X
G
R
E
Y
H
X
X
H
X
L
X
X
H
X
X
X
X
X
X
X
X
X
G
R
E
Y
H
X
X
X
H
L
X
X
H
X
X
X
X
X
X
X
X
X
G
R
E
Y
H
X
X
X
X
L
X
H
H
X
X
X
X
X
X
X
X
X
G
R
E
Y
H
H
H
L
L
L
H
L
H
L
L
H
L
L
L
H
L
H
G
R
E
E
H
H
H
L
L
L
H
L
H
L
H
H
L
H
L
H
L
H
G
R
U
E
H
H
H
L
L
L
H
L
H
H
L
H
L
L
H
H
L
L
G
L
U
E
H
H
H
L
L
L
H
L
H
H
H
L
L
L
L
L
H
L
B
L
U
E
L
X
X
X
X
X
X
H
H
X
X
L
blank display
H
H
H
L
L
L
H
L
H
H
H
L
L
L
L
H
H
H
G
L
U
E
H
X
X
X
X
L
X
X
L
clears character display
H
H
H
L
L
L
H
L
H
X
X
see character code
see character set
BL
CE1
CE2
CE3
CE4
CUE
CU
WR
CLR
A1
A0
D6
D5
D4
D3
D2
D1
D0
Digit
3
2
1
0
H
X
X
X
X
L
X
H
H
previously loaded display
B
E
A
R
H
X
X
X
X
H
X
H
H
display previously stored cursors
B
E
A
R
H
H
H
L
L
H
L
L
H
L
L
X
X
X
X
X
X
H
B
E
A
s
H
H
H
L
L
H
L
L
H
L
H
X
X
X
X
X
X
H
B
E
s
s
H
H
H
L
L
H
L
L
H
H
L
X
X
X
X
X
X
H
B
s
s
s
H
H
H
L
L
H
L
L
H
H
H
X
X
X
X
X
X
H
s
s
s
s
H
H
H
L
L
H
L
L
H
H
L
H
L
L
L
H
L
L
s
E
s
s
H
X
X
X
X
L
X
H
H
disable cursor display
B
E
A
R
H
H
H
L
L
L
L
L
H
H
H
X
X
X
X
X
X
L
B
E
A
R
H
X
X
X
X
H
X
H
H
display stored cursors
B
E
s
s
24
DLR/DLO/DLG3416
Display Blanking
Blank the display by loading a blank or space into each digit of
the display or by using the (BL) display blank input.
Setting the (BL) input low does not affect the contents of either
data or cursor memory. A flashing display can be achieved by
pulsing (BL). A flashing circuit can be constructed using a 555
a stable multivibrator. Figure 3 illustrates a circuit in which vary-
ing R2 (100K~10K) will have a flash rate of 1 Hz~10 Hz.
Figure 3. Flashing circuit using a 555
Figure 3a. Flashing (blanking) timing
555
Timer
R1
4.7 K
R2
100 K
C4
0.01
F
C3
10
F
VCC=5.0 V
To BL
Pin on
Display
1
2
3
4
8
7
6
5
Blanking Pulse Width
50% Duty Factor
500 ms
2 Hz Blanking Frequency
1
0
~
~
~
~
The display can be dimmed by pulsing (BL) line at a frequency
sufficiently fast to not interfere with the internal clock. The dim-
ming signal frequency should be 2.5 KHz or higher. Dimming
the display also reduces power consumption.
An example of a simple dimming circuit using a 556 is illus-
trated in Figure 4. Adjusting potentiometer R3 will dim the dis-
play by changing the blanking pulse duty cycle.
Figure 4. Flashing circuit using a 555
Figure 4a. Flashing (blanking) timing
555
Timer
R1
4.7 K
R2
100 K
C4
0.01
F
C3
10
F
VCC=5.0 V
To BL
Pin on
Display
1
2
3
4
8
7
6
5
Blanking Pulse Width
50% Duty Factor
500 ms
2 Hz Blanking Frequency
1
0
~
~
~
~
Figure 5. Internal block diagram
3 2 1 0
Display
Rows 0 to 6
Timing and Control Logic
Row Control Logic
&
Row Drivers
Row Decoder
RAM Read Logic
RAM
Memory
ROM
7 Bit ASCII Code
Column Data
D6
D5
D4
D3
D2
D1
D0
4480 bits
CUE
OSC
128
Counter
7
Counter
Column Enable
Latches and
Column Drivers
Latches
Column Decoder
WR
A0
A1
Write
4 X 7 bit
Columns 0 to 19
Address Lines
BL
128 X 35 Bit
ASCII
Character
Decode
Cursor
Memory
4 X 1 bit
Cursor Memory Bits 0 to 3
Decoder
Address
25
DLR/DLO/DLG3416
Character Set
Figure 6. Typical schematic, 16-character system
ASCII
CODE
D0
D1
D2
D3
0
0
0
0
0
1
0
0
0
1
0
1
0
0
2
1
1
0
0
3
0
0
1
0
4
1
0
1
0
5
0
1
1
0
6
1
1
1
0
7
0
0
0
1
8
1
0
0
1
9
0
1
0
1
A
1
1
0
1
B
0
0
1
1
C
1
0
1
1
D
0
1
1
1
E
1
1
1
1
F
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
2
3
4
5
6
7
D6 D5 D4 HEX
1. High=1 level. 2. Low=0 level. 3. Upon power up, device will initialize in a random state.
A3
A2
D0-DL
+V
GND
BL
D15 D12 D11 D8 D7 D4 D3 D0
CLR
WR
CU
CUE
A1
A0
7
14
GND
GND
GND
+V
+V
+V
+V
GND
CE1
CE2
CE3
CE4
CE1
CE2
CE3
CE4
CE1
CE2
CE3
CE4
CE1
CE2
CE3
CE4
26
DLR/DLO/DLG3416
Design Considerations
For details on design and applications of the DLX3416 using
standard bus configurations in multiple display systems, or par-
allel 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 Opto-
electronics 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 V
CC
. Additionally, the LEDs may
cause transients in the power supply line while they change dis-
play states. The common practice is to place .01 mF capacitors
close to the displays across V
CC
and GND, one for each dis-
play, and one 10 mF capacitor for every second display.
ESD Protection
The silicon gate CMOS IC of the DLX3416 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 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 packaging.
Soldering Considerations
The DLX3416 can be hand soldered with SN63 solder using a
grounded iron set to 260
C.
Wave soldering is also possible following these conditions: Pre-
heat 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 tempera-
tures 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 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., Frenchtown, NJ;
Garry Manufacturing, New Brunswich, NJ; Robinson-Nugent,
New Albany, IN; and Samtec Electronic Hardware, New Albany,
IN.
For further information refer to Siemens Appnote 22.
Optical Considerations
The 0.270" high characters of the DLX3416 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 DLR3416 is a standard red display and should be matched
with long wavelength pass filter in the 600 nm to 620 nm range.
The DLO3416 is a high efficiency red display and should be
matched with a long wavelength pass filter in the 470 nm to 590
range. The DLG3416 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 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 polar-
ized, anti-reflective, band-pass filters. Circular polarizing further
enhances contrast by reducing the light that travels 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, 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 Plas-
tic Corp., Burlingame, CA; Photo Chemical Products of Califor-
nia, Santa Monica, CA; .E.E.-Atlas, Van Nuys, CA.
Refer to Siemens Appnote 23 for further information.
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