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HDLX-1414 Series
Four Character Smart Alphanumeric Displays
Data Sheet
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 HDLS1414 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.
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)
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.
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]
DATE CODE (YEAR, WEEK)
HDLX-1414 6.10 (0.240) YYWW X Z
PIN NO. 1 2 3 4 5 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
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)
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Absolute Maximum Ratings Supply Voltage, VDD to Ground[1] Input Voltage, Any Pin to Ground Free Air Operating Temperature Range, TA Storage Temperature, TS CMOS IC Junction Temperature Relative Humidity (Noncondensing) at +65C Soldering Temperature, [1.59 mm (0.063 in.) Below Body] Solder Dipping Wave Soldering ESD Classification, R = 1.5 k, C = 100 pF
Note: 1. Maximum Voltage is with no LEDs illuminated.
-0.5 V to 7.0 V -0.5 V to VDD +0.5 V -40C to +85C -40C to +100C +150C 85% 260C for 5 secs 250C for 3 secs Class 1 (0 - 1999 V)
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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 Symbol Min. Supply Voltage VDD 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 Symbol Min. Typ. Max. Max. Blank Current IDD (blnk) 1.0 4.0 Input Current II -40 10 Input Voltage High Input Voltage Low IDD 4 Digits 20 dots/character[2,3] VIH VIL IDD (#) 2.0 GND 110 130 VDD 0.8 160
Units mA A V V mA
Test Conditions All Digits Blanked VIN = 0 V to VDD VDD = 5.0 V
"#" ON in All Four Locations
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 lPEAK lD
Min. 4.0
Typ. 12.7 645 637
Units mcd nm nm
Test Conditions "*" Illuminated in All Four Digits. 19 Dots ON per Digit.
AlGaAs Red HDLU-1414 Parameter Average Luminous Intensity per Digit, Character Average Peak Wavelength Dominant Wavelength[2]
Symbol IV lPEAK lD
Min. 1.2
Typ. 3.1 645 637
Units mcd nm nm
Test Conditions "*" Illuminated in All Four Digits. 19 Dots ON per Digit.
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High Efficiency Red HDLO-1414 Parameter Average Luminous Intensity per Digit, Character Average Peak Wavelength Dominant Wavelength[2]
Symbol IV lPEAK lD
Min. 1.2
Typ. 3.5 635 626
Units mcd nm nm
Test Conditions "*" illuminated in All Four Digits. 19 Dots ON per Digit.
Orange HDLA-1414 Parameter Average Luminous Intensity per Digit, Character Average Peak Wavelength Dominant Wavelength[2]
Symbol IV lPEAK lD
Min. 1.2
Typ. 3.5 600 602
Units mcd nm nm
Test Conditions "*" Illuminated in All Four Digits. 19 Dots ON per Digit.
Yellow HDLY-1414 Parameter Average Luminous Intensity per Digit, Character Average Peak Wavelength Dominant Wavelength[2]
Symbol IV lPEAK lD
Min. 1.2
Typ. 3.7 583 585
Units mcd nm nm
Test Conditions "*" Illuminated in All Four Digits. 19 Dots ON per Digit.
Green HDLG-1414 Parameter Average Luminous Intensity per Digit, Character Average Peak Wavelength Dominant Wavelength[2]
Symbol IV lPEAK lD
Min. 1.2
Typ. 5.6 568 574
Units mcd nm nm
Test Conditions "*" Illuminated in All Four Digits. 19 Dots ON per Digit.
Notes: 1. Refers to the initial case temperature of the device immediately prior to the light measurement. 2. Dominant wavelength, lD, 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 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 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. 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
\WR
A1 X 0 0 1 1
A0 X 0 1 0 1
D6 X
D5 X
D4 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
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 HPDL-1414, 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. 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. For further information on soldering and post-solder cleaning, see Application Note 1027, Soldering LED Components. 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.
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Intensity Bin Limits for HDLS-1414 Intensity Range (mcd) Bin Min. Max. E 3.97 6.79 F 5.55 9.50 G 7.78 13.30 H 10.88 18.62 I 15.24 26.07 J 21.33 36.49
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.
Intensity Bin Limits for HDLX-1414 Intensity Range (mcd) Bin Min. Max. A 1.20 1.77 B 1.45 2.47 C 2.02 3.46 D 2.83 4.85 E 3.97 6.79 F 5.55 9.50 G 7.78 13.30
Note: Test conditions as specified in Optical Characteristic table.
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Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies Limited in the United States and other countries. Data subject to change. Copyright (c) 2006 Avago Technologies Limited. All rights reserved. Obsoletes 5988-3270EN 5989-3191EN June 24, 2006

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