Devices
Part Number HDSP-
Color
Description
Front View
0781
High-Efficiency Red
Numeric, Right Hand DP
A
0782
Low Power
Numeric, Left Hand DP
B
0783
Over Range
1
C
0784
Hexadecimal
D
0791
High-Efficiency Red
Numeric, Right Hand DP
A
0792
High Brightness
Numeric, Left Hand DP
B
0793
Over Range
1
C
0794
Hexadecimal
D
0881
Yellow
Numeric, Right Hand DP
A
0882
Numeric, Left Hand DP
B
0883
Over Range
1
C
0884
Hexadecimal
D
0981
High-Performance Green
Numeric, Right Hand DP
A
0982
Numeric, Left Hand DP
B
0983
Over Range
1
C
0984
Hexadecimal
D
HDSP-078x
HDSP-079x
HDSP-088x
HDSP-098x
Features
Three Character Options
Numeric, Hexadecimal, Over
Range
Three Colors
High Efficiency Red, Yellow,
High Performance Green
4 x 7 Dot Matrix Character
High Efficiency Red, Yellow
and High Performance Green
Two High Efficiency Red
Options
Low Power, High Brightness
Performance Guaranteed
Over Temperature
High Temperature Stabilized
Memory Latch/Decoder/
Driver
TTL Compatible
Categorized for Luminous
Intensity
Description
These standard solid state displays
have a 7.4 mm (0.29 inch) dot
matrix character and an on-board
IC with data memory latch/
decoder and LED drivers in a
glass/ceramic package.
The hermetic HDSP-078x,-079x/
-088x displays utilize a solder
glass frit seal. The HDSP-098X
displays utilize an epoxy glass-to-
ceramic seal.
The numeric devices decode posi-
tive BCD logic into characters
"0-9," a "" sign, decimal point,
and a test pattern. The
hexadecimal devices decode
Glass/Ceramic Numeric and
Hexadecimal Displays for
Industrial Applications
Technical Data
positive BCD logic into 16
characters, "0-9, A-F." An input is
provided on the hexadecimal
devices to blank the display (all
LEDS off) without losing the
contents of the memory.
The over range device displays
"
1" and right hand decimal
point and is typically driven via
external switching transistors.
2
Figure 1. Timing Diagram.
Figure 2. Block Diagram.
SYYWW
COUNTRY CODE
Package Dimensions
3
Optical Characterstics at T
A
= 25
C, V
CC
= 5.0 V
Device
Description
Symbol
Min.
Typ.
Max.
Unit
HDSP-078x Series
Luminous Intensity per LED
I
V
65
140
cd
(Digit Average)
[3,4]
Peak Wavelength
PEAK
635
nm
Dominant Wavelength
[5]
d
626
nm
HDSP-079x Series
Luminous Intensity per LED
I
V
260
620
cd
(Digit Average)
[3,4]
Peak Wavelength
PEAK
635
nm
Dominant Wavelength
[5]
d
626
nm
HDSP-088x Series
Luminous Intensity per LED
I
V
215
490
cd
(Digit Average)
[3,4]
Peak Wavelength
PEAK
583
nm
Dominant Wavelength
[5,6]
d
585
nm
HDSP-098x Series
Luminous Intensity per LED
I
V
298
1100
cd
(Digit Average)
[3,4]
Peak Wavelength
PEAK
568
nm
Dominant Wavelength
d
574
nm
Absolute Maximum Ratings
Description
Symbol
Min.
Max.
Unit
Storage Temperature, Ambient
HDSP-078x/-079x/-088x
T
S
-65
+125
C
HDSP-098x
-55
+100
Operating Temperature, Ambient
[1]
T
A
-55
+100
C
Supply Voltage
[2]
V
CC
-0.5
+7.0
V
Voltage Applied to Input Logic, dp and Enable Pins
V
I
, V
DP
, V
E
-0.5
V
CC
V
Voltage Applied to Blanking Input
[2]
V
R
-0.5
V
CC
V
Wave Solder Temperature at 1.59 mm (0.063 inch)
250
C
below Body, max. 3 seconds
Notes:
1. The nominal thermal resistance of a display mounted in a socket that is soldered onto a printed circuit board is
R
JA
= 50
C/W/device. The device package thermal resistance is R
J-PIN
= 15
C/W/device. The thermal resistance device pin-to-
ambient through the PC board should not exceed 35
C/W/device for operation up to T
A
= +100
C.
2. Voltage values are with respect to device ground, pin 6.
3. These displays are categorized for luminous intensity with the intensity category designated by a letter code located on the back of
the display package. Case temperature of the device immediately prior to the light measurement is equal to 25
C.
Recommended Operating Conditions
Description
Symbol
Min.
Nom.
Max.
Unit
Supply Voltage
[2]
V
CC
4.5
5.0
5.5
V
Operating Temperature, Ambient
[1]
T
A
55
+100
C
Enable Pulse Width
t
W
100
nsec
Time Data Must Be Held Before Positive
t
SETUP
50
nsec
Transition of Enable Line
Time Data Must Be Held After Positive
t
HOLD
50
nsec
Transition of Enable Line
Enable Pulse Rise Time
t
TLH
1.0
msec
4
Electrical/Optical Characteristics
T
A
= 55
C to +100
C
Description
Symbol
Test Conditions
Min.
Typ.
[7]
Max.
Unit
Supply
HDSP-078x Series
I
CC
V
CC
= 5.5 V
78
105
mA
Current
HDSP-079x/-088x/
Characters "5." or
-098x Series
"B" displayed
Power
HDSP-078x Series
P
T
V
CC
= 5.5 V
390
573
mW
Dissipation
HDSP-079x/-088x/
Characters "5." or
-098x Series
"B" displayed
Logic, Enable and Blanking
V
IL
V
CC
= 4.5 V
0.8
V
Low-Level Input Voltage
Logic, Enable High-Level Input
V
IH
2.0
V
Voltage
Blanking High-Voltage; Display
V
BH
2.3
V
Blanked
Logic and Enable Low-Level
I
IL
V
CC
= 5.5 V
1.6
mA
Input Current
Blanking Low-Level Input Current
I
BL
V
IL
= 0.4 V
10
A
Logic, Enable and Blanking
I
IH
V
CC
= 5.5 V
+40
A
High-Level Input Current
V
IH
= 2.4 V
Weight
1.0
gm
Leak Rate
5 x 10
-8
cc/sec
120
175
690
963
Notes:
4. The luminous intensity at a specific operating ambient
temperature, I
v
(T
A
), may be approximated from the following
exponential equation: I
v
(T
A
) = I
v
(25
C) e
[k(T -25
C)]
.
Device
K
HDSP-078 Series
0.0131/
C
HDSP-079x Series
HDSP-088x Series
0.0112/
C
HDSP-098x Series
0.0104/
C
5. The dominant wavelength,
d
, is derived from the CIE chroma-
ticity diagram and represents the single wavelength which
defines the color of the device.
6. The HDSP-088X and HDSP-098X series devices are categor-
ized as to dominant wavelength with the category designated
by a number on the back of the display package.
7. All typical values at V
CC
= 5.0 V and T
A
= 25
C.
Operational
Considerations
Electrical
These devices use a modified
4 x 7 dot matrix of light emitting
diodes to display decimal/
hexadecimal numeric informa-
tion. The high efficiency red and
yellow displays use GaAsP/GaP
LEDs and the high performance
green displays use GaP/GaP
LEDs. The LEDs are driven by
constant current drivers, BCD
information is accepted by the
display memory when the enable
line is at logic low and the data is
latched when the enable is at
logic high. Using the enable pulse
width and data setup and hold
times listed in the Recommended
Operating Conditions allows data
to be clocked into an array of
displays at a 6.7 MHz rate.
The decimal point input is active
low true and this data is latched
into the display memory in the
same fashion as the BCD data.
The decimal point LED is driven
by the on-board IC.
The blanking control input on the
hexadecimal displays blanks
(turns off) the displayed
information without disturbing
the contents of display memory.
The display is blanked at a
minimum threshold level of 2.0
volts. When blanked, the display
standby power is nominally 250
mW at T
A
= 25
C.
The ESD susceptibility of the IC
devices is Class A of MIL-STD-
883 or Class 2 of DOD-STD-1686
and DOD-HDBK-263.
A
5
Mechanical
These displays are hermetically
sealed for use in environments
that require a high reliability
device. These displays are
designed and tested to meet a
helium leak rate of
5 x 10
-8
cc/sec.
These displays may be mounted
by soldering directly to a printed
circuit board or insertion into a
socket. The lead-to-lead pin
spacing is 2.54 mm (0.100 inch)
and the lead row spacing is 15.24
mm (0.600 inch). These displays
may be end stacked with 2.54
mm (0.100 inch) spacing
between outside pins of adjacent
displays. Sockets such as Augat
324-AG2D (3 digits) or Augat
508-AG8D (one digit, right angle
mounting) may be used.
The primary thermal path for
power dissipation is through the
device leads. Therefore, to insure
reliable operation up to an
ambient temperature of +100
C,
it is important to maintain a
base-to-ambient thermal
resistance of less than
35
C watt/device as measured on
top of display pin 3.
For further information on
soldering and post solder
cleaning, see Application Note
1027, Soldering LED
Components
.
Preconditioning
These displays are 100% pre-
conditioned by 24 hour storage at
125
C, at 100
C for the HDSP-
098x Series.
Contrast Enhancement
These display devices are
designed to provide an optimum
ON/OFF contrast when placed
behind an appropriate contrast
enhancement filter. For further
information on contrast
enhancement, see Application
Note 1015, Contrast
Enhancement for LED
Displays.
Over Range Display
The over range devices display
"
1" and decimal point. The
character height and package
configuration are the same as the
numeric and hexadecimal
devices. Character selection is
obtained via external switching
transistors and current limiting
resistors.
Absolute Maximum Ratings
Description
Symbol
Min
Max
Unit
Storage Temperature, Ambient
T
S
65
+125
C
Operating Temperature, Ambient
T
A
55
+100
C
Forward Current, Each LED
I
F
10
mA
Reverse Voltage, Each LED
V
R
5
V
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