The CD40192BC and CD40193BC up/down counters aremonolithic complementary MOS (CMOS) integrated circuits.The CD40192BC is a BCD counter, while theCD40193BC is a binary counter.Counting up and counting down is performed by two countinputs, one being held HIGH while the other is clocked. Theoutputs change on the positive-going transition of thisclock.These counters feature preset inputs that are enabledwhen load is a logical “0” and a clear which forces all outputsto “0” when it is at logical “1”. The counters also havecarry and borrow outputs so that they can be cascadedusing no external circuitry.