Page 1
RED
DLR2416
Alphanumeric IntelligentDisplay
FEATURES
• Dot Matrix Replacement for DL2416T
• 0.200" 5 x 7 Dot Matrix Characters
• 128 Special ASCII Characters for English, German,
Italian, Swedish, Danish, and Norwegian
Languages
• Wide Viewing Angle: X Axis 50 ° Maximum,
Y Axis ± 75 ° Maximum
• Close Multi-line Spacing, 0.8" 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
• Direct Access to Each Digit Independently
• and Asynchronously
• Independent Cursor Function
• Memory Function: Clears Character and Cursor
Memory Simultaneously
• True Blanking for Intensity Dimming Applications
• End-Stackable, 4-Character Package
• Intensity Coded for Display Uniformity
• Extended Operating Temperature Range:
–40 ° C to +85 ° C
• Superior ESD Immunity
• Wave Solderable
• TTL Compatible over Operating Temperature
Range
• Interdigit Blanking
HIGH EFFICIENCY RED
GREEN
DLO2416
DLG2416
.200” 4-Character 5x7 Dot Matrix
®
with Memory/Decoder/Driver
Package Dimensions in inches (mm)
.250
(6.35)
.1.00 max.
(25.4)
Part No.
EIA Date Code
DLX2416
SIEMENS YYWW
.018
(.46)
±.002 (.05) 18 pl.
.136
(3.45)
.198
(5.03)
.070 (1.78) ±.003 (.08)
.010 (.25) 8 pl.
Z
.260 (6.60)
Luminous
.100 16 pl.
(2.54) at Seating Plane
Intensity Code
.800
(20.32)
max.
TOLERANCE: XXX±.01 (.25)
.031
(.79)
.050 4 pl.
(1.27)
.160 ±.020
(4.06 ±.51)
.031
(.79)
.Pin 1
Indicator
.095
(2.41)
ref.
DESCRIPTION
The DLR/DLO/DLG2416 is a four digit 5x7 dot matrix display module
with a built-in CMOS integrated circuit. This display is X/Y stackable.
The integrated circuit contains memory, ASCII ROM decoder, multiplexing circuitry and drivers. Data entry is asynchronous and can be
random. A display system can be built using any number of DLX2416s
since each digit 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 two chip enables (CE1
CE2
) four displays (16 characters) can easily be interconnected with-
out a decoder.
Data lines are connected to all DLX2416s directly and in parallel, as is
the write line (WR
). The display will then behave as a write-only mem-
ory.
The cursor function causes all dots of a digit position to illuminate at
half brightness. The cursor is not a character, and when removed the
previously displayed character will reappear.
The DLX2416 has several features superior to competitive devices.
True “blanking” allows the designer to dim the display for more flexibility of display 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,
German, Italian, Swedish, Danish, and Norwegian.
All products are subjected to out-going AQL’s of 0.25% for brightness
matching, visual alignment and dimensions, 0.065% for electrical and
functional.
.260
(6.60) ref.
.600±.020
(15.24 ±.51)
.012 (.30)
±.002 (.05)
18 pl.
and
5–1
Page 2
T
DS
T
DH
T
W
T
ACC
T
AH
T
AS
T
CEH
T
CUH
T
CES
T
CUS
T
CLRD
2.0 V
0.8 V
CE1, CE2
CU, CLR
A
0
, A
1
D0-D
6
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.
Maximum Ratings
DC Supply Voltage........................................–0.5 V to +7.0 Vdc
Input Voltage, Respect to GND
(all inputs) .......................................... –0.5 V to V
Operating Temperature ..................................... –40 °
Storage Temperature....................................... –40 °
Relative Humidity at 85 °
C....................................................85%
+0.5 Vdc
CC
C to +85 ° C
C to +100 ° C
Maximum Solder Temperature, 0.063" (1.59 mm)
below Seating Plane, t<5 sec...................................... 260 °
Optical Characteristics
Spectral Peak Wavelength
Red ...................................................................... 660 nm typ.
HER ..................................................................... 630 nm typ.
Green .................................................................. 565 nm typ.
Character Height.............................................0.200" (5.08 mm)
Time Averaged Luminous Intensity
Red................................................................ 60 µ
HER............................................................. 100 µ
Green.......................................................... 120 µ
LED to LED Intensity Matching at V
(1)
at V
=5 V
CC
cd/LED typ.
cd/LED typ.
cd/LED typ.
=5 V.............1.8:1.0 max.
CC
LED to LED Hue Matching (Green only)
at V
=5 V ........................................................... ± 2 nm max.
CC
Viewing Angle (off normal axis)
Horizontal ............................................................... ±
Vertical . ................................................................. ±
Note 1: Peak luminous intensity values can be calculated by multiply-
ing these values by 7.
50 ° max.
75 ° max.
Pins and Functions
Pin Function Pin Function
1 CE1 Chip Enable 10 GND
Chip Enable 11 D0 Data Input
Clear 12 D1 Data Input
CUE Cursor Enable
13 D2 Data Input
C
2 CE2
3 CLR
4
5 CU Cursor Select 14 D3 Data Input
6WR
Write 15 D6 Data Input
7 A1 Digit Select 16 D5 Data Input
8 A0 Digit Select 17 D4 Data Input
9V
CC
18 BL Display Blank
Figure 2. Timing characteristics —Write Cycle waveforms
Figure 1. Top View
18 17 16 15 14 13 12 11 10
digit 3 digit 2 digit 1 digit 0
1 2 3 4 5 6 7 8 9
DC Characteristics
–40 ° C +25 ° C +85 ° C
Parameter
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
I
80 dots on 135 160 110 130 95 115 mA V
CC
Cursor all dots at 50% 135 100 100 mA V
I
CC
Blank 2.8 4.0 2.3 3.0 2.0 2.5 mA V
I
CC
(all inputs) 30 60 120 25 50 100 20 40 80
I
IL
(all inputs) 2.0 2.0 2.0 V V
V
IH
(all inputs) 0.8 0.8 0.8 V V
V
IL
V
CC
4.5 5.0 5.5 4.5 5.0 5.5 4.5 5.0 5.5 V
Units Condition
=5 V
CC
=5 V
CC
=5 V, BL=0.8 V
CC
µ AV
=0.8 V, V
IN
=5 V ± 0.5 V
CC
=5 V ± 0.5 V
CC
CC
=5 V
5–2
DLR/DLO/DLG2416
Page 3
AC Characteristics Guaranteed Minimum Timing, Parameters at V
=5.0 V ± 0.5 V
CC
Parameter Symbol –40 ° C +25 ° C +85 ° C Unit
Chip Enable Set Up Time T
Address Set Up Time T
Cursor Set Up Time T
Chip Enable Hold Time T
Address Hold Time T
Cursor Hold Time T
Clear Disable Time T
Write Time T
Data Set Up Time T
Data Hold Time T
Clear Time T
Access Time T
Note: T
=Set Up Time + Write Time + Hold Time.
ACC
CES
AS
CUS
CEH
AH
CUH
CLRD
W
DS
DH
CLR
ACC
000ns
10 10 10 ns
10 10 10 ns
000ns
20 30 40 ns
20 30 40 ns
111
µ
s
60 70 90 ns
20 30 50 ns
20 30 40 ns
111
µ
s
90 110 140 ns
Loading Data Table
Control Address Data Display Digit
BL CE1 CE2 CUE CU WR CLR A1A0D6D5D4D3D2D1D03210
H X X L X H H previously loaded display G R E Y
H H X L X X H XXXXXXXXXGREY
H X H L X X H XXXXXXXXXGREY
H L L L H L H LLHLLLHLHGREE
H L L L H L H LHHLHLHLHGRUE
H L L L H L H HLHLLHHLLGLUE
H L L L H L H HHHLLLLHLBLUE
L X X X X H H X X blank display
H L L L H L H HHHLLLHHHGLUE
H X X L X H L X X clears character displays
H L L L H L L X X see character code see character set
X=don’t care
Loading Cursor Table
Digit
BL CE1 CE2 CE3 CE4 CUE CU WR CLR A1A0D6D5D4D3D2D1D03210
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 LLXXXXXXHBEA
■
H H H L L H L L H LHXXXXXXHBE ■■
H H H L L H L L H HLXXXXXXHB ■■■
H H H L L H L L H HHXXXXXXH ■■■■
H H H L L H L L H HLXXXXXXL ■ E ■■
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 HHXXXXXXLBEAR
H X X X X H H X H display stored cursors B E
X=don’t care
■
= all dots on
■■
5–3
DLR/DLO/DLG2416
Page 4
Loading Data
Setting the chip enable (CE1, CE2) to their true state will enable
data loading. The desired data code (D0-D6) and digit address
(A0, A1) must be held stable during the write cycle for storing
new data.
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 µ 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.
Setting the chip enables (CE1
their true state will enable cursor loading. A write (WR
, CE2) and cursor select (CU) to
) 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
width should not be less than the write (WR
) pulse or erroneous
) pulse
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 af fect the
contents of cursor memory.
Loading Cursor
Setting the chip enables (CE1, CE2) 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
width should not be less than the write (WR
) pulse or erroneous
) pulse
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 af fect the
contents of cursor memory.
Display Blanking
Blanking the display may be accomplished by loading a blank
or space into each digit of the display or by using the (BL
) dis-
play blank input.
Setting the (BL
) input low does not affect the contents of either
data or cursor memory.
A flashing circuit can easily be constructed using a 555 astable
multivibrator. Figure 3 illustrates a circuit in which varying R2
(100K~10K) will have a flash rate of 1 Hz~10 Hz.
The display can be dimmed by pulse width modulating the
(BL) at a frequency sufficiently fast to not interfere with the
internal clock. The dimming 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 illustrated in Figure 4. Adjusting potentiometer R3 will dim the display by changing the blanking pulse duty cycle.
Figure 3. DLX2416—Flashing circuit using a 555
and Flashing (Blanking) timing
VCC=5.0 V
1
2
3
To BL
Pin on
Display
1
0
~
2 Hz Blanking Frequency
~
4
~
500 ms
~
555
Timer
8
7
6
5
C4
0.01 µF
Blanking Pulse Width
≈50% Duty Factor
Figure 4. DLX2416Dimming circuit using a 556
and Dimming (Blanking) timing
R2
47 KΩ
R1
200Ω
C2
0.01 µF
C1
4700 pF
1
0
~
200 µs
~
~
5 KHz Blanking Frequency
~
Dimming (Blanking)
1
2
3
4
5
6
7
Dual Timer
Control
556
14
13
12
11
10
9
To BL Pin
on Display
8
Blanking Pulse Width
4 µs min., 196 µs max.
R1
4.7 KΩ
R2
100 KΩ
C3
10 µF
VCC=5.0 V
R3
500 KΩ
C3
1000 pF
C4
0.01 µF
5–4
DLR/DLO/DLG2416
Page 5
Figure 5. Internal block diagram
Display
Rows 0 to 6
Row Control Logic
&
Row Drivers
RAM Read Logic
D6
D5
D4
D3
D2
D1
D0
4 X 7 bit
128
OSC
÷
Counter
RAM
Memory
Address Lines
÷
7
Counter
7 Bit ASCII Code
Cursor
Memory
4 X 1 bit
3 2 1 0
Timing and Control Logic
Row Decoder
ROM
128 X 35 Bit
ASCII
Character
Latches
Decode
Column Decoder
4480 bits
Cursor Memory Bits 0 to 3
Columns 0 to 19
Column Data
BL
Column Enable
Latches and
Column Drivers
WR
A0
A1
Write
Address
Decoder
Figure 6. Typica schematic—16-character system
+5
GND
D15 D12 D11 D8 D7 D4 D3 D
BL
CLR
7
6
14
D0-D
WR
CU
CUE
2
A A
0
1
CE2
CE1
CE2
CE2
CE1
CE1
CUE
0
5–5
DLR/DLO/DLG2416
Page 6
Design Considerations
For details on design and applications of the DLX2416 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, or 6800, refer to Appnote 15 in the current Siemens
Optoelectronics Data Book.
Electrical and Mechanical Considerations
V oltage 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
. Additionally, the LEDs may
CC
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 VCC and GND, one for each
display, and one 10 mF capacitor for every second display.
ESD Protection
The silicon gate CMOS IC of the DLX2416 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 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 packaging.
Soldering Considerations
The DLX2416 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 °C on the solder side of the PC
board or a package surface temperature of 85°C. Water solu-
ble 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 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 any
solvent as some may chemically attack the nylon package.
Maximum exposure should not exceed two minutes at elevated
temperatures. Acceptable solvents are TF (trichorotribluorethane), 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 manufacturers are: Allied Chemical Corportation, 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 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 0.200" high characters of the DLX2416 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 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 DLR2416 is a standard red display and should be
matched with long wavelength pass filter in the 600 nm to
620 nm range. The DLO2416 is a high efficiency red display
and should be matched with a long wavelength pass filter in
the 470 nm to 590 range. The DLG2416 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
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. 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 Plastic Corp., Burlingame, CA; Photo Chemical Products of California, Santa Monica, CA; .E.E.-Atlas, Van Nuys,
CA.
Refer to Siemens Appnote 23 for further information.
5–6
DLR/DLO/DLG2416
Page 7
Character Set
D0
ASCII
CODE
D6 D5 D4 HEX
0
0
0
0
1
1
1
D1
D2
D3
0
0
0
1
1
0
1
1
0
0
0
1
1
0
0
0
0
0
0
0
0
1
0
0
1
2
3
4
5
6
1
1
1
0
0
0
0
2
3
1
0
0
0
1
1
0
0
5
4
1
0
1
1
1
1
0
0
7
6
1
0
0
0
0
0
1
1
9
8
1
0
1
1
0
0
1
1
B
A
1
0
0
0
1
1
1
1
D
C
1
0
1
1
1
1
1
1
F
E
0
1
1
1
1
7
1. High=1 level. 2. Low=0 level. 3. Upon power up, device will initialize in a random state.
5–7
DLR/DLO/DLG2416
Loading...