DM7556 Datasheet PDF

National Semiconductor DM7556

The counters feature both conventional 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 inputs 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 Features Y Y Y Y Y Typical clock frequency 35 MHz TRI-STATE outputs Fully independent clear...