HDSP-0781_08 Datasheet, PDF (5/8 Pages) AVAGO TECHNOLOGIES LIMITED – Glass/Ceramic Numeric and Hexadecimal Displays for Industrial Applications

Electrical/Optical Characteristics
T_A = –55°C to +100°C
Description
Supply
HDSP-078x Series
Current
HDSP-079x/-088x/-098x Series
       
Power
Dissipation
HDSP-078x Series
HDSP-079x/-088x/-098x Series
     
Logic, Enable and Blanking Low-Level
Input Voltage
Logic, Enable High-Level Input Voltage
Blanking High-Voltage; Display Blanked
Logic and Enable Low-Level Input Current
Blanking Low-Level Input Current
Logic, Enable and Blanking High-Level
Input Current
Weight
Leak Rate
Symbol
I_CC
P_T
V_IL
V_IH
V_BH
I_IL
I_BL
I_IH
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] Max.   Unit
78
105
mA
120
175
390
573
mW
690
963
0.8
V
2.0
V
2.3
V
–1.6
mA
–10
µA
+40
µA
1.0
gm
5 x 10^-8 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    K
HDSP-078Series –0.0131/°C
HDSP-079x Series
HDSP-088x Series –0.0112/°C
HDSP-098x Series –0.0104/°C
5. The dominant wavelength, l_d, is derived from the CIE chroma­ticity dia-
gram and represents the single wavelength which defines the color of
the device.
6. The HDSP-088X and HDSP-098X series devices are categor­ized 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
informa­tion. 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 con-
stant 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 dis-
turbing 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.