HDSP-078X Datasheet, PDF (4/8 Pages) Agilent(Hewlett-Packard) – Glass/Ceramic Numeric and Hexadecimal Displays for Industrial Applications

4
Electrical/Optical Characteristics
T_A = –55°C to +100°C
Description
Symbol
Supply
HDSP-078x Series
I_CC
Current
HDSP-079x/-088x/
-098x Series
Power
HDSP-078x Series
P_T
Dissipation HDSP-079x/-088x/
-098x Series
Logic, Enable and Blanking
V_IL
Low-Level Input Voltage
Logic, Enable High-Level Input
V_IH
Voltage
Blanking High-Voltage; Display
V_BH
Blanked
Logic and Enable Low-Level
I_IL
Input Current
Blanking Low-Level Input Current
I_BL
Logic, Enable and Blanking
I_IH
High-Level Input Current
Weight
Leak Rate
Test Conditions
V_CC = 5.5 V
Characters “5.” or
“B” displayed
V_CC = 5.5 V
Characters “5.” or
“B” displayed
V_CC = 4.5 V
V_CC = 5.5 V
V_IL = 0.4 V
V_CC = 5.5 V
V_IH = 2.4 V
Min.
Typ.^[7]
78
120
390
690
Max.
105
175
573
963
0.8
2.0
2.3
–1.6
–10
+40
1.0
5 x 10^-8
Unit
mA
mW
V
V
V
mA
µA
µA
gm
cc/sec
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(TA-25°C)]}.
Device
HDSP-078 Series
HDSP-079x Series
HDSP-088x Series
HDSP-098x Series
K
–0.0131/°C
–0.0112/°C
–0.0104/°C
5. The dominant wavelength, λ_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.