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VorsichtsmaBnahmen
In all Our display modules which include a CMOS decoder,
it is vital for no input ever to be left "floating"
even for a fraction of a second. Hence pulldown resistor
must be used.
However, where an input is not used, it can be connected straight
to + or to earth(depending on function) without resistor.
In TTL a floating input may cause faulty operation but will
not result in the decoder being destroyed.
Value
of pulldown resistor
| Assigned
working voltage |
Pulldown
resistor |
| 24
V |
4,7
k 1/2 W |
When
used in environments affected by interferences, the supply
and the logic inputs should be protected by suitable filtering.
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