资料介绍
74LS90.pdf DM74LS90 DM74LS93 Decade and Binary Counters
June 1989
DM74LS90 DM74LS93
Decade and Binary Counters
General Description
Each of these monolithic counters contains four master- count pulses are applied to input A and the outputs are as
slave flip-flops and additional gating to provide a divide-by- described in the appropriate truth table A symmetrical di-
two counter and a three-stage binary counter for which the vide-by-ten count can be obtained from the ’LS90 counters
count cyc
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