MODEL 8559A SERVICE
SYMBOLS USED IN SCHEMATIC AND BLOCK DIAGRAMS
BASIC LOGIC SYMBOLS
Distinctive
-
Shape Symbols
Output is active when input is active.
SCHMITT
TRIGGER
AND FUNCTION
OR FUNCTION
EXCLUSIVE
-
OR
FUNCTION
WIRED AND
FUNCTION
WIRED OR
FUNCTION
Output changes abruptly as a fixed
DC
level is crossed by the input signal.
Output is active only when all inputs are
active.
Output is active when one or more in
-
puts are active.
Output is active when only one input is
active.
Two or more elements are joined
together to achieve the effect of an AND
function.
Two or more elements are joined
together to achieve the effect of an OR
function.
FIGURE
8
-
1.
SYMBOLS USED IN SCHEMATIC AND BLOCK DIAGRAMS(3 OF
4)