Dual 4-Bit Binary Counter
General Description
Each of these monolithic circuits contains eight masterslave
flip-flops and additional gating to implement two individual
four-bit counters in a single package. The
DM74LS393 comprises two independent four-bit binary
counters each having a clear and a clock input. N-bit binary
counters can be implemented with each package providing
the capability of divide-by-256. The DM74LS393 has parallel
outputs from each counter stage so that any submultiple
of the input count frequency is available for system-timing
signals.
Features
Dual version of the popular DM74LS93
DM74LS393 dual 4-bit binary counter with individual
clocks
Direct clear for each 4-bit counter
Dual 4-bit versions can significantly improve system
densities by reducing counter package count by 50%
Typical maximum count frequency 35 MHz
Buffered outputs reduce possibility of collector commutation
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