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CD40193.pdf
消耗积分:5 |
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大小:122 |
2008-04-02
丁冬芹
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monolithic complementary MOS (CMOS) integrated circuits.
The CD40192BC is a BCD counter, while the
CD40193BC is a binary counter.
Counting up and counting down is performed by two count
inputs, one being held HIGH while the other is clocked. The
outputs change on the positive-going transition of this
clock.
These counters feature preset inputs that are enabled
when load is a logical “0” and a clear which forces all outputs
to “0” when it is at logical “1”. The counters also have
carry and borrow outputs so that they can be cascaded
using no external circuitry.
All inputs are protected against damage due to static discharge
by clamps to VDD and VSS.
The CD40192BC is a BCD counter, while the
CD40193BC is a binary counter.
Counting up and counting down is performed by two count
inputs, one being held HIGH while the other is clocked. The
outputs change on the positive-going transition of this
clock.
These counters feature preset inputs that are enabled
when load is a logical “0” and a clear which forces all outputs
to “0” when it is at logical “1”. The counters also have
carry and borrow outputs so that they can be cascaded
using no external circuitry.
All inputs are protected against damage due to static discharge
by clamps to VDD and VSS.
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