| Customer
support |
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| Where can I find the rest of a multi-part symbol? |
|
| Some components such as a 4001B NOR gate IC
are made up of several independent gates or parts (four in
this example). |
|
| With circuit diagram symbols in Circuit Wizard,
Livewire and PCB Wizard, you need to drag on another symbol
for each of the parts you wish to use. |
|
| When you add additional symbols, the software
will automatically allocate different part or gates to the
same
physical IC. A letter after the symbol's number
will
indicate to which part of the IC it refers, for example IC1a,
IC1b, IC1c and so on. |
| |
| Common examples
of multi-part symbols |
|
| Below you can find some common examples of multi-part
symbols. |
|
 |
CMOS and
TTL logic gate components are the most common type of
multi-part symbols. Typically there are two or four gates
per IC. |
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A NE556 timer is equivalent
to two NE555 timers in a single IC. |
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Digital flip-flop ICs
such as the 4013B or the 7474 contain two separate parts
within the same physical device. |
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Transistor driver ICs
often feature many individual transistor outputs. The
ULN2803 for example contains eight such drivers. |
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