Dual Decade Counters

This circuit contains eight master-slave Flip-Flops and additional gating to implement two individual four-bit Counters The HD74LS390 incorporates dual divide-by-two and divide-by-five Counters which CAN be used to implement cycle lengths equal to any whole and / or cumulative multiples of 2 and / or 5 up to divide-by-100. When connected as a bi- quinary Counter the separate divide-by-two circuit CAN be used to provide symmetry (a square wave) at the final output stage. By Renesas Technology
HD74LS390 's PackagesHD74LS390 's pdf datasheet
HD74LS390P
HD74LS390FPEL SOP




HD74LS390 Pinout, Pinouts
HD74LS390 pinout,Pin out
This is one package pinout of HD74LS390,If you need more pinouts please download HD74LS390's pdf datasheet.

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