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Four Character Smart Alphanumeric Displays Technical Data
HDLX-1414 Series
Features
* 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)
Description
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 HDLS-1414 (sun. view.) HDLU-1414 (low power) High Efficiency Red HDLO-1414 Orange HDLA-1414 Yellow HDLY-1414 Green HDLG-1414
ESD Warning: Standard CMOS Handling Precautions should be observed with the HDLX-1414.
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Package Dimensions
17.66 (0.695) 4.45 TYP. (0.175) 0.39 (2X) TYP. (0.015) 0.25 0.13 TYP. (0.010 0.005)
20.12 (0.792)
9.14 (0.360)
15.30 (0.600)
PIN 1 IDENTIFIER PART NUMBER LUMINOUS INTENSITY COLOR BIN [3]
PIN NO. FUNCTION D5 DATA INPUT D4 DATA INPUT WR WRITE A1 DIGIT SELECT A0 DIGIT SELECT VDD PIN NO. 7 8 9 10 11 12 FUNCTION GROUND D0 DATA INPUT D1 DATA INPUT D2 DATA INPUT D3 DATA INPUT D6 DATA INPUT 1
DATE CODE (YEAR, WEEK)
HDLX-1414 6.10 (0.240) YYWW X Z
2 3 4 5 6
4.10 (0.160) PIN 1 0.51 0.13 (0.020 0.005)TYP. DIMENSIONS ARE IN MILLIMETERS (INCHES). 2.54 TYP. (0.100)
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% Wave Solder Temperature, 1.59 mm (0.063 in.) below Body ............................ 250C for 3 secs ESD Classification, R = 1.5 k, C = 100 pF ....... Class 1 (0 - 1999 V)
Note: 1. Maximum Voltage is with no LEDs illuminated.
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Character Set
D0 ASCII CODE D1 D2 D3 D6 D5 D4 HEX 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
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
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Recommended Operating Conditions
Parameter Supply Voltage Symbol VDD Min. 4.5 Typ. 5.0 Max. 5.5 Units V
Electrical/Optical Characteristics over Operating Temperature Range
4.5 < VDD < 5.5 V (unless otherwise specified). 25C[1] Parameter Blank Current Input Current Input Voltage High Input Voltage Low IDD 4 Digits 20 dots/character[2,3] Symbol IDD (blnk) II VIH VIL IDD (#) -40 2.0 GND 110 130 Min. Typ. 1.0 Max. Max. 4.0 10 VDD 0.8 160 Units mA A V V mA "#" ON in all four locations Test Conditions All Digits Blanked VIN = 0 V to VDD VDD = 5.0 V
Notes: 1. VDD = 5.0 V. 2. Average IDD measured at full brightness. Peak IDD = 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 Average Luminous Intensity per digit, Character Average Peak Wavelength Dominant Wavelength[2] Symbol IV Min. 4.0 Typ. 12.7 Units mcd Test Conditions "*" illuminated in all four digits. 19 dots ON per digit.
PEAK D
645 637
nm nm
AlGaAs Red HDLU-1414 Parameter Average Luminous Intensity per digit, Character Average Peak Wavelength Dominant Wavelength[2] Symbol IV Min. 1.2 Typ. 3.1 Units mcd Test Conditions "*" illuminated in all four digits. 19 dots ON per digit.
PEAK D
645 637
nm nm
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High Efficiency Red HDLO-1414 Parameter Average Luminous Intensity per digit, Character Average Peak Wavelength Dominant Wavelength[2] Symbol IV Min. 1.2 Typ. 3.5 Units mcd Test Conditions "*" illuminated in all four digits. 19 dots ON per digit.
PEAK D
635 626
nm nm
Orange HDLA-1414 Parameter Average Luminous Intensity per digit, Character Average Peak Wavelength Dominant Wavelength[2] Symbol IV Min. 1.2 Typ. 3.5 Units mcd Test Conditions "*" illuminated in all four digits. 19 dots ON per digit.
PEAK D
600 602
nm nm
Yellow HDLY-1414 Parameter Average Luminous Intensity per digit, Character Average Peak Wavelength Dominant Wavelength[2] Symbol IV Min. 1.2 Typ. 3.7 Units mcd Test Conditions "*" illuminated in all four digits. 19 dots ON per digit.
PEAK D
583 585
nm nm
Green HDLG-1414 Parameter Average Luminous Intensity per digit, Character Average Peak Wavelength Dominant Wavelength[2] Symbol IV Min. 1.2 Typ. 5.6 Units mcd Test Conditions "*" illuminated in all four digits. 19 dots ON per digit.
PEAK D
568 574
nm nm
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.
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AC Timing Characteristics over Operating Temperature Range at VDD = 4.5 V
Parameter Address Setup Address Hold Data Setup Data Hold Write Time Symbol tAS tAH tDS tDH tW Min. 10 40 50 40 75 Units ns ns ns ns ns
Timing Diagram
Enlarged Character Font
2.29 (0.090) TYP.
2.0 V A0 - A1 tAS WR tAH 2.0 V 0.8 V tW D0 - D6 tDS tDH 2.0 V 0.8 V
0.25 (0.010) TYP.
0.8 V
0.56 (0.022) TYP.
3.61 (0.142) 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).
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Electrical Description
Pin Function \Write (\WR, pin 3) Address Inputs (A1 and A0, pins 4 and 5) VDD (pin 6) Ground (GND, pin 7) Data Inputs (D0-D6, pins 1, 2, 8-12) Description WR must be logic 0 to store data in the display. 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 is the positive power supply input. Ground is the display ground. D0-D6 are used to specify the input data for the display.
Mechanical and Electrical Considerations
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.
\WR
A1 X 0 0 1 1
A0 X 0 1 0 1
D6 D5 D4 X X X
D3 X
D2 X
D1 X
D0 X
Function No Change
1 0 0 0 0
Digit 0 ASCII Data (Right Most Character) Digit 1 ASCII Data Digit 2 ASCII Data Digit 3 ASCII Data (Left Most Character)
0 = Logic 0; 1 = Logic 1; X = Do Not Care.
Write to Character RAM
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
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.
Data Entry
Figure 1 shows a truth table for the HDLX-1414 display. Address inputs A0 and A1 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.
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CHARACTER RAM A0 - A1 D0 - D6 2 7 WRITE ADDRESS DATA IN WRITE WR (4 x 7) DATA OUT 7
ASCII DECODER CHARACTER SELECT COLUMN DATA
5
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.
For further information on contrast enhancement, see Application Note 1015, Contrast Enhancement Techniques for LED Displays.
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.
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Intensity Bin Limits for HDLS-1414
Bin E F G H I J 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
Note: Test conditions as specified in Optical Characteristic table.
Intensity Bin Limits for HDLX-1414
Bin A B C D E F G 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
Note: Test conditions as specified in Optical Characteristic table.
Color Bin Limits
Color Green 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
Yellow
Note: Test conditions as specified in Optical Characteristic table.
www.agilent.com/semiconductors
For product information and a complete list of distributors, please go to our web site. For technical assistance call: Americas/Canada: +1 (800) 235-0312 or (916) 788-6763 Europe: +49 (0) 6441 92460 China: 10800 650 0017 Hong Kong: (+65) 6756 2394 India, Australia, New Zealand: (+65) 6755 1939 Japan: (+81 3) 3335-8152 (Domestic/International), or 0120-61-1280 (Domestic Only) Korea: (+65) 6755 1989 Singapore, Malaysia, Vietnam, Thailand, Philippines, Indonesia: (+65) 6755 2044 Taiwan: (+65) 6755 1843 Data subject to change. Copyright (c) 2004 Agilent Technologies, Inc. Obsoletes 5988-2802EN July 14, 2004 5988-3270EN

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