DLR2416 HIGH EFFICIENCY RED DLO2416 GREEN DLG2416 RED .200” 4-Character 5x7 Dot Matrix Alphanumeric IntelligentDisplay® with Memory/Decoder/Driver Package Dimensions in inches (mm) .031 (.79) .250 (6.35) .260 (6.60) ref. .136 (3.45) .031 (.79) .800 (20.32) max. .198 (5.03) .012 (.30) ±.002 (.05) 18 pl. .1.00 max. (25.4) .Pin 1 Indicator Part No. EIA Date Code .050 4 pl. (1.27) 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 .160 ±.020 (4.06 ±.51) .095 (2.41) ref. DLX2416 SIEMENS YYWW Z .600±.020 (15.24 ±.51) .070 (1.78) ±.003 (.08) .010 (.25) 8 pl. .260 (6.60) Luminous Intensity Code .100 16 pl. .018 (2.54) at Seating Plane (.46) ±.002 (.05) 18 pl. TOLERANCE: XXX± .01 (.25) 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 and CE2) four displays (16 characters) can easily be interconnected without 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 memory. 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. 5–1 Maximum Ratings DC Supply Voltage ........................................–0.5 V to +7.0 Vdc Input Voltage, Respect to GND (all inputs) .......................................... –0.5 V to VCC +0.5 Vdc Operating Temperature ..................................... –40°C to +85°C Storage Temperature ....................................... –40°C to +100°C Relative Humidity at 85°C.................................................... 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 Height ............................................. 0.200" (5.08 mm) Time Averaged Luminous Intensity(1) at VCC=5 V Red................................................................ 60 µcd/LED typ. HER ............................................................. 100 µcd/LED typ. Green .......................................................... 120 µcd/LED typ. LED to LED Intensity Matching at VCC=5 V .............1.8:1.0 max. LED to LED Hue Matching (Green only) at VCC=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. Pins and Functions Pin Function Pin Function 1 CE1 Chip Enable 10 GND 2 CE2 Chip Enable 11 D0 Data Input 3 CLR Clear 12 D1 Data Input 4 CUE Cursor Enable 13 D2 Data Input 5 CU Cursor Select 14 D3 Data Input 6 WR Write 15 D6 Data Input 7 A1 Digit Select 16 D5 Data Input 8 A0 Digit Select 17 D4 Data Input 9 VCC 18 BL Display Blank Figure 2. Timing characteristics —Write Cycle waveforms 2.0 V 0.8 V CE1, CE2 CU, CLR TCES TCUS TCLRD TCEH TCUH 2.0 V 0.8 V A0, A1 TAS TAH Figure 1. Top View 2.0 V 0.8 V D0-D6 18 17 16 15 14 13 12 11 10 TDS TDH WR 2.0 V 0.8 V digit 3 digit 2 digit 1 digit 0 TW TACC 1 2 3 4 5 6 7 8 9 Note: These waveforms are not edge triggered. DC Characteristics –40°C +25°C +85°C Parameter Min. ICC 80 dots on Typ. Max. 135 160 ICC Cursor all dots at 50% Typ. Max. 110 130 135 ICC Blank IIL (all inputs) 30 VIH (all inputs) 2.0 2.8 4.0 60 120 25 2.3 3.0 50 100 5.0 5.5 Units Condition 115 mA VCC=5 V 100 mA VCC=5 V 2.0 2.5 mA VCC=5 V, BL=0.8 V 40 80 µA VIN=0.8 V, VCC=5 V V VCC=5 V ± 0.5 V 0.8 V VCC=5 V ± 0.5 V 5.5 V Typ. Max. 95 20 2.0 0.8 4.5 Min. 100 2.0 VIL (all inputs) VCC Min. 0.8 4.5 5.0 5–2 5.5 4.5 5.0 DLR/DLO/DLG2416 AC Characteristics Guaranteed Minimum Timing, Parameters at VCC=5.0 V ± 0.5 V Parameter Symbol –40°C +25°C +85°C Unit Chip Enable Set Up Time TCES 0 0 0 ns Address Set Up Time TAS 10 10 10 ns Cursor Set Up Time TCUS 10 10 10 ns Chip Enable Hold Time TCEH 0 0 0 ns Address Hold Time TAH 20 30 40 ns Cursor Hold Time TCUH 20 30 40 ns Clear Disable Time TCLRD 1 1 1 µs Write Time TW 60 70 90 ns Data Set Up Time TDS 20 30 50 ns Data Hold Time TDH 20 30 40 ns Clear Time TCLR 1 1 1 µs Access Time TACC 90 110 140 ns Note: TACC=Set Up Time + Write Time + Hold Time. Loading Data Table Control BL CE1 CE2 CUE Address CU WR CLR A1 A0 Data D6 D5 D4 Display Digit D3 D2 D1 D0 3 2 1 0 H X X L X H H previously loaded display G R E Y H H X L X X H X X X X X X X X X G R E Y H X H L X X H X X X X X X X X X G R E Y H L L L H L H L L H L L L H L H G R E E H L L L H L H L H H L H L H L H G R U E H L L L H L H H L H L L H H L L G L U E H L L L H L H H H H L L L L H L B L U E L X X X X H H X X blank display H L L L H L H H H H L H H H G L U E H X X L X H L X X clears character displays H L L L H L L X X see character code L L see character set X=don’t care Loading Cursor Table Digit BL CE1 CE2 CE3 CE4 CUE CU WR CLR A1 A0 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 ■ H H H L L H L L H L H X X X X X X H B E ■ ■ H H H L L H L L H H L X X X X X X H B ■ ■ ■ H H H L L H L L H H H X X X X X X H ■ ■ ■ ■ H H H L L H L L H H L X X X X X X L ■ 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 H B E A R H X X X X H H X H display stored cursors B E ■ ■ H D6 X D5 X D4 X D3 X D2 X D1 X D0 L 3 2 1 0 X=don’t care ■= all dots on 5–3 DLR/DLO/DLG2416 Figure 3. DLX2416—Flashing circuit using a 555 and Flashing (Blanking) timing 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. VCC=5.0 V 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 µs. 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. 2 To BL Pin on Display 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) pulse width should not be less than the write (WR) pulse or erroneous data may appear in the display. R1 4.7 KΩ 8 1 7 555 Timer 3 6 4 5 R2 100 KΩ C3 10 µF C4 0.01 µF 1 0 Blanking Pulse Width ≈50% Duty Factor 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 contents of cursor memory. ~ ~ 500 ms ~ ~ 2 Hz Blanking Frequency Figure 4. DLX2416Dimming circuit using a 556 and Dimming (Blanking) timing Loading Cursor VCC=5.0 V 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) pulse width should not be less than the write (WR) pulse or erroneous data may appear in the display. Dimming (Blanking) Control R2 47 KΩ R1 200Ω C2 0.01 µF 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 contents of cursor memory. 1 14 2 13 3 4 C1 4700 pF 556 Dual Timer 12 R3 500 KΩ C3 1000 pF 11 5 10 6 9 7 8 C4 0.01 µF To BL Pin on Display 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) display blank input. 1 Setting the (BL) input low does not affect the contents of either data or cursor memory. 0 ~ ~ 200 µs ~ 5 KHz Blanking Frequency ~ 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. Blanking Pulse Width 4 µs min., 196 µs max. 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. 5–4 DLR/DLO/DLG2416 Figure 5. Internal block diagram Display Rows 0 to 6 3 2 1 0 Columns 0 to 19 Row Control Logic & Row Drivers ÷ 128 Counter OSC Timing and Control Logic ÷7 Counter Row Decoder RAM Memory Cursor Memory 4 X 1 bit 4 X 7 bit Latches 7 Bit ASCII Code Column Decoder RAM Read Logic D6 D5 D4 D3 D2 D1 D0 BL ROM 128 X 35 Bit ASCII Character Decode 4480 bits Column Enable Latches and Column Drivers Column Data Address Lines Cursor Memory Bits 0 to 3 WR A0 A1 Write Address Decoder CUE Figure 6. Typica schematic—16-character system +5 GND D15 D12 D11 D8 D7 D4 D3 D0 BL D0-D6 7 CLR WR CU CUE 2 A 0 A1 14 CE2 CE2 CE2 CE1 CE1 CE1 5–5 DLR/DLO/DLG2416 Design Considerations For further information refer to Siemens Appnotes 18 and 19. 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. 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. 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 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. 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 different characters. The only limitation is cost. Take into consideration the ambient lighting environment for the best cost/ benefit ratio for filters. 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. 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. 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 soluble organic acid flux (except carboxylic acid) or resin-based RMA flux without alcohol can be used. 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. 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 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%. 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: 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. Acceptable commercial solvents are: Basic TF, Arklone, P. Genesolv, D. Genesolv DA, Blaco-Tron TF, Blaco-Tron TA, and Freon TA. 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. 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. Refer to Siemens Appnote 23 for further information. 5–6 DLR/DLO/DLG2416 Character Set D0 D1 D2 D3 D6 D5 D4 HEX ASCII CODE 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 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 1. High=1 level. 2. Low=0 level. 3. Upon power up, device will initialize in a random state. 5–7 DLR/DLO/DLG2416