user manual

The F line label is used to indicate S-state logic. The S-state enable i:
F and numerals or letters are used as with the G label:
Counter with
3-State Outputs 3-Stat
->c
4 Fl
-R
XT
CTR
(1) l-
(2) ’ -
(4) ’ -
(8) ’ -
nput is labelled with an
e Buffers
F
I--i’-
U6A
Figure 6. Schematic Symbols for Digital Integrated Circuits (7 of 7)
Weighting of Input and Output Lines
The coding of multiplexers, demultiplexers, encoders, and decoders is shown by decimal
weighting. An example is the 2-to-4-line decoder shown on the previous page.
Weighting of Flip-Flops
When the position of a flip-flop in an array is significant (as in counters and shift registers),
the flip-flop is labelled with its decimal weight. An example is the “Counter with S-State
Outputs” shown above.
General Information 19