AGILENT HDLG-1414

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 ................ –40˚C to +85˚C
Storage Temperature, TS .......................................... –40˚C to +100˚C
CMOS IC Junction Temperature ............................................... +150˚C
Relative Humidity (non-condensing) at +65˚C .............................. 85%
Wave Solder Temperature,
1.59 mm (0.063 in.) below Body ............................ 250˚C for 3 secs
ESD Classification, R = 1.5 kΩ, 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).
25˚C[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
µA
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 IDD measured at full brightness. Peak IDD = 28/15 x Average IDD (#).
3. IDD (#) max. = 130 mA, 150˚C IC junction temperature and VDD = 5.5 V.
Optical Characteristics at 25˚C[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
λPEAK
645
nm
λD
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
λPEAK
645
nm
λD
637
nm
Dominant
Wavelength[2]
5
High Efficiency Red HDLO-1414
Symbol
Min.
Typ.
Units
Test Conditions
Average Luminous
Intensity per digit,
Character Average
Parameter
IV
1.2
3.5
mcd
“*” illuminated in all four digits.
19 dots ON per digit.
Peak Wavelength
λPEAK
635
nm
λD
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
λPEAK
600
nm
λD
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
λPEAK
583
nm
λD
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
λPEAK
568
nm
λD
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, λD, 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 – D6
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 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.
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 –40˚C to
+85˚C 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
WRITE
ADDRESS
DATA
OUT
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.
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Data subject to change.
Copyright © 2004 Agilent Technologies, Inc.
Obsoletes 5988-2802EN
July 14, 2004
5988-3270EN