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MIL-DTL-28803-1 Display, Optoelectronic, Segmented Readout, Backlighted, Style Ii \(Light Emitting Diodes\), Rfi Shielded, Moisture Sealed, High Impact Shock, Type, Ro1

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MIL­DTL­28803/1E
TABLE III. Truth table for seven segment numeric display, with latch (circuit configuration 1).
Input
Output
Δ = Segment lit 1/
BCD
Display
DPT
EN
8
4
2
1
BI
A
B
C
D
E
F
G
DPT
Δ
Δ
Δ
Δ
Δ
Δ
0
0
0
0
0
1
Δ
Δ
0
0
0
0
1
1
Δ
Δ
Δ
Δ
Δ
0
0
0
1
0
1
Δ
Δ
Δ
Δ
Δ
0
0
0
1
1
1
Δ
Δ
Δ
Δ
0
0
1
0
0
1
Δ
Δ
Δ
Δ
Δ
0
0
1
0
1
1
Δ
Δ
Δ
Δ
Δ
0
0
1
1
0
1
Δ
Δ
Δ
0
0
1
1
1
1
Δ
Δ
Δ
Δ
Δ
Δ
Δ
0
1
0
0
0
1
Δ
Δ
Δ
Δ
Δ
0
1
0
0
1
1
0
1
0
1
0
1
Blank
0
1
0
1
1
1
Blank
0
1
1
0
0
1
Blank
0
1
1
0
1
1
Blank
0
1
1
1
0
1
Blank
0
1
1
1
1
1
Blank
X
X
X
X
X
0
Blank
Δ 2/
1
X
X
X
X
X
X
ˇ
1/
See figure 5 for seven segment numeric display output letter assignments.
2/
The decimal point (DPT) operates independently of the conversion logic. To illuminate,
connect to 5.0 V dc.
TABLE IV. Truth table for four segment sign display, with latch (circuit configuration 2).
Input
Output
Δ = Segment lit 1/
BCD
Display
DPT
EN
8
4
2
1
BI
A
B
C
D
E
F
G
DPT
Δ
Δ
Δ
Δ
0
0
0
0
0
1
Δ
Δ
0
0
0
0
1
1
X
X
X
X
X
0
Blank
Δ 2/
1
X
X
X
X
X
X
ˇ
1/
See figure 6 for four segment sign display output letter assignments.
2/
The decimal point (DPT) operates independently of the conversion logic. To illuminate,
connect to 5.0 V dc.
9



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