Four Character Smart Alphanumeric Displays Technical Data HDLX-1414 Series Features Description * Dot Matrix Replacement of HPDL-1414 * Smart Alphanumeric Display Built-in RAM, ASCII Decoder, and LED Drive Circuitry * 128 ASCII Character Set * End Stackable * Categorized for Luminous Intensity; Yellow and Green Categorized for Color * Low Power and Sunlight Viewable AlGaAs Versions * Wide Viewing Angle (50 Typical) These are 3.7 mm (0.145 inch) four character 5 x 7 dot matrix displays driven by an on-board CMOS IC. These displays are pin for pin compatible with the HPDL-1414. The IC stores and decodes 7-bit ASCII data and displays it in an easy to read 5 x 7 font. Multiplexing and LED drive circuitry is also included in the display, and fast setup and hold times allow it to interface easily with common microprocessors. The address and data inputs can be directly connected to microprocessor address and data buses. The HDLX-1414 offers a larger character set than the HPDL-1414. Lower case letters and special symbols are now offered, made possible by the 5 x 7 dot matrix character layout. The difference between the sunlight viewable HDLS-1414 and the low power HDLU-1414 lies in the brightness level. The sunlight viewable version is internally set to provide high intensity characters. The low power version uses the same bright LED technology, but reduces the current through each LED to a much lower level, and maintains an intensity comparable to the HDLO-1414. Devices AlGaAs Red High Efficiency Red Orange Yellow Green HDLS-1414 (sun. view.) HDLO-1414 HDLA-1414 HDLY-1414 HDLG-1414 HDLU-1414 (low power) ESD Warning: Standard CMOS Handling Precautions should be observed with the HDLX-1414. 2 Package Dimensions 17.66 (0.695) 4.45 TYP. (0.175) 0.25 0.13 TYP. (0.010 0.005) 0.39 (2X) TYP. (0.015) 15.30 (0.600) 9.14 (0.360) 20.12 (0.792) PIN 1 IDENTIFIER DATE CODE (YEAR, WEEK) PART NUMBER LUMINOUS INTENSITY COLOR BIN [3] PIN NO. HDLX-1414 6.10 (0.240) YYWW X Z PIN 1 0.51 0.13 (0.020 0.005)TYP. FUNCTION 7 GROUND 2 D4 DATA INPUT 8 D0 DATA INPUT 9 D1 DATA INPUT WR WRITE 4 A1 DIGIT SELECT 10 D2 DATA INPUT 5 A0 DIGIT SELECT 11 D3 DATA INPUT 6 VDD 12 D6 DATA INPUT 2.54 TYP. (0.100) DIMENSIONS ARE IN MILLIMETERS (INCHES). Absolute Maximum Ratings Supply Voltage, VDD to Ground[1] ................................. -0.5 V to 7.0 V Input Voltage, Any Pin to Ground ........................ -0.5 V to VDD +0.5 V Free Air Operating Temperature Range, TA ................ -40C to +85C Storage Temperature, TS .......................................... -40C to +100C CMOS IC Junction Temperature ............................................... +150C Relative Humidity (non-condensing) at +65C .............................. 85% Maximum Solder Temperature, 1.59 mm (0.063 in.) below Seating Plane, t < 5 sec. .......................... +260C ESD Classification, R = 1.5 k, C = 100 pF ....... Class 1 (0 - 1999 V) Note: 1. Maximum Voltage is with no LEDs illuminated. PIN NO. D5 DATA INPUT 3 4.10 (0.160) FUNCTION 1 3 Character Set D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D4 HEX 0 1 2 3 4 5 6 7 8 9 A B C D E F ASCII CODE D6 D5 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 NOTES: 1 = HIGH LEVEL 0 = LOW LEVEL 4 Recommended Operating Conditions Parameter Supply Voltage Symbol Min. Typ. Max. Units VDD 4.5 5.0 5.5 V Electrical/Optical Characteristics over Operating Temperature Range 4.5 < VDD < 5.5 V (unless otherwise specified). 25C [1] Parameter Symbol Min. Typ. Max. Units Test Conditions 4.0 mA All Digits Blanked VIN = 0 V to VDD VDD = 5.0 V Blank Current IDD (blnk) Input Current II -40 10 A Input Voltage High VIH 2.0 VDD V Input Voltage Low VIL GND 0.8 V 160 mA IDD 4 Digits 20 dots/character[2,3] 1.0 Max. IDD (#) 110 130 "#" ON in all four locations Notes: 1. VDD = 5.0 V. 2. Average I DD measured at full brightness. Peak I DD = 28/15 x Average IDD (#). 3. IDD (#) max. = 130 mA, 150C IC junction temperature and VDD = 5.5 V. Optical Characteristics at 25C[1] VDD = 5.0 V at Full Brightness AlGaAs Red HDLS-1414 Parameter Symbol Min. Typ. Units Test Conditions Average Luminous Intensity per digit, Character Average IV 4.0 12.7 mcd "*" illuminated in all four digits. 19 dots ON per digit. Peak Wavelength PEAK 645 nm D 637 nm Dominant Wavelength[2] AlGaAs Red HDLU-1414 Parameter Symbol Min. Typ. Units Test Conditions Average Luminous Intensity per digit, Character Average IV 1.2 3.1 mcd "*" illuminated in all four digits. 19 dots ON per digit. Peak Wavelength PEAK 645 nm D 637 nm Dominant Wavelength[2] 5 High Efficiency Red HDLO-1414 Parameter Symbol Min. Typ. Units Test Conditions Average Luminous Intensity per digit, Character Average IV 1.2 3.5 mcd "*" illuminated in all four digits. 19 dots ON per digit. Peak Wavelength PEAK 635 nm D 626 nm Dominant Wavelength [2] Orange HDLA-1414 Parameter Symbol Min. Typ. Units Test Conditions Average Luminous Intensity per digit, Character Average IV 1.2 3.5 mcd "*" illuminated in all four digits. 19 dots ON per digit. Peak Wavelength PEAK 600 nm D 602 nm Dominant Wavelength [2] Yellow HDLY-1414 Parameter Symbol Min. Typ. Units Test Conditions Average Luminous Intensity per digit, Character Average IV 1.2 3.7 mcd "*" illuminated in all four digits. 19 dots ON per digit. Peak Wavelength PEAK 583 nm D 585 nm Dominant Wavelength [2] Green HDLG-1414 Parameter Symbol Min. Typ. Units Test Conditions Average Luminous Intensity per digit, Character Average IV 1.2 5.6 mcd "*" illuminated in all four digits. 19 dots ON per digit. Peak Wavelength PEAK 568 nm D 574 nm Dominant Wavelength [2] Notes: 1. Refers to the initial case temperature of the device immediately prior to the light measurement. 2. Dominant wavelength, D, is derived from the CIE chromaticity diagram, and represents the single wavelength which defines the color of the device. 6 AC Timing Characteristics over Operating Temperature Range at VDD = 4.5 V Parameter Symbol Min. Units Address Setup tAS 10 ns Address Hold tAH 40 ns Data Setup tDS 50 ns Data Hold tDH 40 ns Write Time tW 75 ns Timing Diagram Enlarged Character Font 2.29 (0.090) TYP. 2.0 V A0 - A1 0.8 V tAS tAH 0.56 (0.022) TYP. 2.0 V WR 0.8 V 3.61 (0.142) TYP. tW 2.0 V D0 - D 6 0.8 V tDS tDH 0.25 (0.010) TYP. 0.51 (0.020) TYP. NOTES: 1. UNLESS OTHERWISE SPECIFIED, THE TOLERANCE ON ALL DIMENSIONS IS 0.254 mm (0.010"). 2. DIMENSIONS ARE IN MILLIMETERS (INCHES). 7 Electrical Description Pin Function Mechanical and Electrical Considerations Description \Write (\WR, pin 3) WR must be logic 0 to store data in the display. Address Inputs (A1 and A0, pins 4 and 5) A0 and A1 select a specific location in the display memory. Address 00 accesses the far right character, and address 11 accesses the far left position. VDD (pin 6) VDD is the positive power supply input. Ground (GND, pin 7) Ground is the display ground. Data Inputs (D0-D6, pins 1, 2, 8-12) D0-D6 are used to specify the input data for the display. \WR A1 A0 D6 D5 D4 1 X X X 0 0 0 Digit 0 ASCII Data (Right Most Character) 0 0 1 Digit 1 ASCII Data 0 1 0 Digit 2 ASCII Data 0 1 1 Digit 3 ASCII Data (Left Most Character) X X Figure 1. Display Truth Table Display Internal Block Diagram Figure 2 shows the HDLX-1414 display internal block diagram. The CMOS IC consists of a 4 x 7 Character RAM, a 128-character ASCII decoder and the refresh circuitry necessary to synchronize the decoding and driving of four 5 x 7 dot matrix characters. Four 7-bit ASCII words are stored in the Character RAM. The IC reads the ASCII data and decodes it vita the 128-character ASCII decoder. This decoder includes the 64-character set of the HPDL1414, 32 lower case ASCII symbols, and 32 foreign language symbols. D3 D2 D1 D0 Function X X X X No Change Write to Character RAM 0 = Logic 0; 1 = Logic 1; X = Do Not Care. Data Entry Figure 1 shows a truth table for the HDLX-1414 display. Address inputs A0 and A 1 are used to select the digit location in the display. When A0 and A1 are both logic low, data is loaded into the right most character. Data inputs D0-D6 are used to load information into the display. Data is latched into the given character address on the rising edge of the \WR signal. Data and Address inputs must be held stable during the write cycle to ensure that correct data is stored in the display. The HDLX-1414 is a 12-pin DIP package that can be stacked to create a character array of any size. The display is designed to operate reliably in -40C to +85C ambient temperatures. The HDLX-1414 is assembled by die attaching and wire bonding 140 LEDs and a CMOS IC to a high temperature printed circuit board. A polycarbonate lens is placed over the PC board, creating a protective air gap over the LED wire bonds. Backfill epoxy environmentally seals the display package. This package construction makes the display highly tolerant to temperature cycling and allows wave soldering. ESD and Latchup Protection The inputs to the CMOS IC are protected against static discharge and input current latchup. However, for best results, standard CMOS handling precautions should be used. Prior to use, the HDLX-1414 should be stored in antistatic tubes or conductive material. During assembly a grounded conductive work area should be used, and assembly personnel should wear conductive wrist straps. Lab coats made of synthetic material should be avoided since they are prone to static charge build-up. Input current latchup can be caused when the CMOS inputs are subjected either to a voltage below ground (Vin < ground) or higher than VDD (Vin > VDD) and when a high current is forced into the input. To prevent input current latchup and ESD damage, unused inputs should be connected either to ground or to VDD. Voltages should not be 8 CHARACTER RAM A0 - A1 D0 - D6 2 7 DATA OUT WRITE ADDRESS DATA IN ASCII DECODER 7 CHARACTER SELECT COLUMN DATA 5 WRITE WR (4 x 7) 3 ROW SELECT COLUMN DRIVERS ROW DRIVERS OSC + 32 +7 ROW SELECT DISPLAY Figure 2. Display Internal Block Diagram. applied to the inputs until VDD has been turned on, and high transient input voltages should be eliminated. For further information on soldering and post-solder cleaning, see Application Note 1027, Soldering LED Components. Soldering Instructions The HDLX-1414 is compatible with hand- and wave-solder processes. The use of a no-clean flux is recommended. The polycarbonate lens on these displays is incompatible with some fluxes and cleaning solutions. It is not recommended for use with heated Terpene, or solutions of propylene glycol monomethyl ether and monoethanolamine. Contrast Enhancement The objective of contrast enhancement is to provide good readability in the end user's ambient lighting conditions. By using both luminance (brightness) and chrominance (color) contrast techniques, the ON dots of the display can be made to stand out against a dark background. For further information on contrast enhancement, see Application Note 1015, Contrast Enhancement Techniques for LED Displays. 9 Intensity Bin Limits for HDLS-1414 Intensity Range (mcd) Min. Max. 3.97 6.79 5.55 9.50 7.78 13.30 10.88 18.62 15.24 26.07 21.33 36.49 Bin E F G H I J Note: Test conditions as specified in Optical Characteristic table. Intensity Bin Limits for HDLX-1414 Intensity Range (mcd) Min. Max. 1.20 1.77 1.45 2.47 2.02 3.46 2.83 4.85 3.97 6.79 5.55 9.50 7.78 13.30 Bin A B C D E F G Note: Test conditions as specified in Optical Characteristic table. Color Bin Limits Color Green Yellow Bin 1 2 3 4 3 4 5 6 Color Range (nm) Min. Max. 576.0 580.0 573.0 577.0 570.0 574.0 567.0 571.5 581.5 585.0 584.0 587.5 586.5 590.0 589.0 592.5 Note: Test conditions as specified in Optical Characteristic table. www.semiconductor.agilent.com Data subject to change. Copyright (c) 2001 Agilent Technologies, Inc. July 11, 2001 Obsoletes 5988-2802EN 5988-3270EN