Tri-state Programmable Binary Counters - National Semiconductor

These circuits are synchronous, edge-sensitive, fully-pro- grammable 4-bit Counters DM7556 DM8556 . The Counters feature both con- ventional totem-pole and TRI-STATE outputs; such that when the outputs are in the high impedance mode, they CAN be used to enter data from the bus lines. In addition, the clear input operates completely independent of all other in- puts. During the programming operation, data is loaded into the Flip-Flops on the positive-going edge of the Clock pulse. To facilitate cascading of these Counters the MAX COUNT output CAN be tied directly into the count enable input of the next Counter By National Semiconductor Corporation
DM7556 's PackagesDM7556 's pdf datasheet

DM7556 Pinout, Pinouts
DM7556 pinout,Pin out
This is one package pinout of DM7556,If you need more pinouts please download DM7556's pdf datasheet.

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