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DIDS-40Z -ZM 10
Para 3-7. Z/3-7.3
The symbol shown below represents one version of the INeL USIV:]!:
O~
function.
The output is low if anyone (or more) of the inputs is high.
~--~D""'--F
'INPUT
A
8
C
L
L.
L.
L
L.
H
L.
H
L.
L.
H
H
H
L
L
H
L.
H
H
H
L
OUTPUT
F
H
L
L
L
L
L
L
H
H
H
L.
3-7. 3 State Indicator
(Activ~l.
The presence of the small circle symbol at the
input(s) or output(s) of a function indicates:
J-3Z
a.
Input condition: the electrical condition at the input terminal(s)
which controls the active state of the respective function.
b.
Output condition: the electrical condition existing at the output
terminal(s) of an activated function.
0---
c.
A small circle(s) at the input(s) to any element (logical or
nonlogical) indicates that the relatively low (L) input signal
activates the function.
Conversely. the absence of a small
circle indicates that the relatively high (H) input signal a"ctivates'
the function.
d.
A small circle at the symbol output indicates that the output
terminal of the activated function is relatively low (L).
This
small circle will never be drawn by itself on a diagram.
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