AVAGO HDLX-1414

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.
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)
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.
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)
0.25 ± 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]
HDLX-1414
6.10
(0.240)
YYWW
X
Z
PIN NO.
4.10
(0.160)
PIN 1
0.51 ± 0.13
(0.020 ± 0.005)TYP.
2.54 TYP.
(0.100)
FUNCTION
Note:
1. Maximum Voltage is with no LEDs illuminated.
2
FUNCTION
D5 DATA INPUT
7
2
D4 DATA INPUT
8
D0 DATA INPUT
9
D1 DATA INPUT
WR WRITE
3
GROUND
4
A1 DIGIT SELECT
10
D2 DATA INPUT
5
A0 DIGIT SELECT
11
D3 DATA INPUT
6
VDD
12
D6 DATA INPUT
DIMENSIONS ARE IN MILLIMETERS (INCHES).
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 +65°C
Soldering Temperature, [1.59 mm (0.063 in.) Below Body]
Solder Dipping
Wave Soldering
ESD Classification, R = 1.5 kΩ, C = 100 pF
PIN NO.
1
–0.5 V to 7.0 V
–0.5 V to VDD +0.5 V
–40˚C to +85˚C
–40°C to +100°C
+150°C
85%
260°C for 5 secs
250°C for 3 secs
Class 1 (0 – 1999 V)
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
3
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)
-25°C[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
VDD
0.8
160
130
Units
mA
µA
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, 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
Average Luminous Intensity per Digit,
Character Average
Peak Wavelength
Dominant Wavelength[2]
AlGaAs Red HDLU-1414
Parameter
Average Luminous Intensity per Digit,
Character Average
Peak Wavelength
Dominant Wavelength[2]
4
Symbol
IV
Min.
4.0
lPEAK
lD
Symbol
IV
lPEAK
lD
Min.
1.2
Typ.
12.7
Units
mcd
645
637
nm
nm
Typ.
3.1
Units
mcd
645
637
nm
nm
Test Conditions
“*” Illuminated in All Four Digits.
19 Dots ON per Digit.
Test Conditions
“*” Illuminated in All Four Digits.
19 Dots ON per Digit.
High Efficiency Red HDLO-1414
Parameter
Average Luminous Intensity per Digit,
Character Average
Peak Wavelength
Dominant Wavelength[2]
Orange HDLA-1414
Parameter
Average Luminous Intensity per Digit,
Character Average
Peak Wavelength
Dominant Wavelength[2]
Yellow HDLY-1414
Parameter
Average Luminous Intensity per Digit,
Character Average
Peak Wavelength
Dominant Wavelength[2]
Green HDLG-1414
Parameter
Average Luminous Intensity per Digit,
Character Average
Peak Wavelength
Dominant Wavelength[2]
Symbol
IV
Min.
1.2
lPEAK
lD
Symbol
IV
Min.
1.2
lPEAK
lD
Symbol
IV
Min.
1.2
lPEAK
lD
Symbol
IV
lPEAK
lD
Min.
1.2
Typ.
3.5
Units
mcd
635
626
nm
nm
Typ.
3.5
Units
mcd
600
602
nm
nm
Typ.
3.7
Units
mcd
583
585
nm
nm
Typ.
5.6
Units
mcd
568
574
nm
nm
Test Conditions
“*” illuminated in All Four Digits.
19 Dots ON per Digit.
Test Conditions
“*” Illuminated in All Four Digits.
19 Dots ON per Digit.
Test Conditions
“*” Illuminated in All Four Digits.
19 Dots ON per Digit.
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.
5
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).
6
Electrical Description
Pin Function
\Write (\WR, Pin 3)
Address Inputs
(A1 and A0, Pins 4 and 5)
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.
VDD (Pin 6)
Ground (GND, Pin 7)
Data Inputs
(D0–D6, Pins 1, 2, 8-12)
\WR
A1
A0
D6
D5
D4
D3
D2
D1
D0
Function
1
X
X
X
X
X
X
X
X
X
No Change
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)
Figure 1. Display truth table.
0 = Logic 0; 1 = Logic 1; X = Do Not Care.
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.
7
Write to
Character
RAM
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.
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 –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
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 use with heated Terpene, or
solutions of propylene glycol
monomethyl ether and
monoethanolamine.
Soldering Instructions
The HDLX-1414 is compatible
with hand- and wave-solder
processes. The use of a no-clean
flux is recommended.
For further information on
soldering and post-solder
cleaning, see Application Note
1027, Soldering LED
Components.
The polycarbonate lens on these
displays is incompatible with
some fluxes and cleaning
solutions. It is not recommended
Contrast Enhancement
The objective of contrast
enhancement is to provide good
readability in the end user’s
8
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.
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
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.
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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Data subject to change. Copyright © 2006 Avago Technologies Limited. All rights reserved. Obsoletes 5988-3270EN
5989-3191EN June 24, 2006