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DLR1414 HIGH EFFICIENCY RED DLO1414 GREEN DLG1414
RED .145" 4-character 5 x 7 Dot Matrix Alphanumeric Intelligent Display with Memory/Decoder/Driver
Dimensions in inches (mm)
.0200 (.51) .1750 (4.45) .0920 (2.34) .240 (6.10) ref. .012 (.30) .002 (.05) 12 pl.
.0220 (.56) .1440 (3.66) .700 max. (17.78) Luminous Intensity Code
.800 (20.32) max.
.600.020 (15.24.51)
.210 (5.33)
.010 (.25) 4 pl. .070 (1.78) .003 (.08) 4 pl. .240 (6.10)
Part Number
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 25C * 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: -40C to +85C * End Stackable, 4-Character Package
Pin Indicator .050 (1.27) 4 pl.
DLX 1414 SIEMENS YYWW
Z
.160.020 (4.06.51)
EIA Date Code .100 (2.54) 10 pl. at Seating Plane .018 (.46) 12 pl.
.095 (2.41) ref.
Tolerance: XXX .01 (.254)
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). The display then will behave as a 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.
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Maximum Ratings DC Supply Voltage ....................... -0.5 to +7.0 Vdc Input Voltage Levels Relative to GND (all inputs) ............. -0.5 to VCC +0.5 Vdc Operating Temperature ..................-40C to +85C Storage Temperature....................-40C to +100C Maximum Solder Temperature ........063" (1.59 mm) below Seating Plane, t<5 sec.................... 260C Relative Humidity at 85C ................................85% 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 Intensity1 (100% brightness, VCC=5 V) Red ............................................ 50 cd/LED typ. HER............................................ 60 cd/LED typ. Green ......................................... 70 cd/LED typ. LED to LED Intensity Matching ........... 1.8:1.0 max. LED to LED Hue Matching at VCC=5 V (Green only) ..................................... 2 nm max.
Note 1: Peak luminous intensity values can be calculated by multiplying these values by 7.
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 1 2 3 4 5 6
Function D5 Data Input D4 Data Input WR Write A1 Digit Select A0 Digit Select VCC
Pin 7 8 9 10 11 12
Function GND D0 Data Input (LSB) D1 Data Input D2 Data Input D3 Data Input D6 Data Input (MSB)
Figure 2. Timing characteristics (VCC=4.5 V)
A0, A1 TAS D0-D6 TDS WR TW TACC Note: These waveforms are not edge triggered. TDH 2.0 V 0.8 V TAH 2.0 V 0.8 V 2.0 V 0.8 V
DC Characteristics
Parameter Min. ICC 4 Digits on 20 dots/digit ICC Blank IIL (all inputs) VIH VIL VCC 4.5 5.0 30 2.0 0.8 5.5 4.5 5.0 -40C Typ. 90 2.8 60 Max. 120 4.0 120 25 2.0 0.8 5.5 4.5 5.0 Min. +25C Typ. 80 2.3 50 Max. 105 3.0 100 20 2.0 0.8 5.5 Min. +85C Typ. 70 2.0 40 Max. 95 2.5 80 mA mA mA V V V VCC=5 V VCC=WR=5 V, VIN=0 V VIN=0.8 V, VCC=5 V VCC=5 V 0.5 V VCC=5 V 0.5 V Units Conditions
AC Characteristics Guaranteed Minimum Timing Parameters at VCC=5.0 V 0.5 V
Parameter Address Set Up Time Address Hold Time Write Time Data Set Up Time Data Hold Time Access Time(1) Symbol TAS TAH TW TDS TDH TACC -40C 10 20 60 20 20 90 +25C 10 30 70 30 30 110 +85C 10 40 90 50 40 140 Units ns ns ns ns ns ns
Note: 1. TACC=Set Up Time + Write Time + Hold Time.
DLR/DLO/DLG1414
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Loading Data State Table
WR H L L L L L L L L L H H L L X L H L H H L X A1 A0 D6 D5 D4 D3 D2 D1 D0 3 previously loaded display H H H H H H L L L L L L L H L L L H L L H L L L H H H L H H L L L H L H H H L L H H G G G G B B B 2 R R R L L L L Digit 1 E E U U U E E 0 Y E E E E E W
see character code
see character set
X=don't care
Figure 3. Typical interconnection for 32 characters
V+ VD31 D28 D27 D24 D23 D20 D19 D16 D15 D12 D11 D8 D7 D4 D3 D0
DATA D0-D6 ADDRESS A0 A1
7 2 7 6 5 4 3 2 1 0 74138
A B C G
ADDRESS A2 A3 A4 WRITE
D0-D6 A0-A1 WR
DLR/DLO/DLG1414
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Figure 4. Block diagram
Display Rows 0 to 6 3 Row Control Logic & Row Drivers 2 1 0 Columns 0 to 19
OSC
/ 128 Counter
/7 Counter
Timing and Control Logic
RAM Read Logic D6 D5 D4 D3 D2 D1 D0 Column Decoder
Row Decoder Latches 7 Bit ASCII Code ROM
128 X 35 Bit ASCII Character Decode 4480 bits
Column Data
RAM Memory
4 X 7 bit
Column Enable Latches and Column Drivers
WR A0 A1
Write Address Decoder
Character Set
D0 D1 D2 D3 D6 D5 D4 HEX ASCII CODE 0 0 0 0 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
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
1. High=1 level. 2. Low=0 level. 3. Upon power up, device will initialize in a random state.
DLR/DLO/DLG1414
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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 Voltage 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 VCC. Additionally, the 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 VCC and GND, 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 260C. Wave soldering is also possible following these conditions: Preheat that does not exceed 93C on the solder side of the PC board or a package surface temperature of 85C. Water soluble organic acid flux (except carboxylic acid) or resinbased RMA flux without alcohol can be used. Wave temperature of 245C 5C with a dwell between 1.5 sec. to 3.0 sec. Exposure to the wave should not exceed temperatures above 260C 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 (60C) 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.
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 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, 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.
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.
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DLR/DLO/DLG1414

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