MM54HCT191, MM54HCT190 Datasheet (National Semiconductor)

MM54HCT191, MM54HCT190, Synchronous Binary Up/Down Counters

These high speed synchronous counters utilize advanced silicon-gate CMOS technology They possess the high noise immunity and low power consumption of CMOS technology along with the speeds of low power Schottky TTL These circuits are synchronous reversible up down counters The MM54HCT191 MM74HCT191 a

MM54HCT191 Features

* Y Y Y Y Level changes on Enable or Down Up can be made regardless of the level of the clock Low quiescent supply current 80 mA maximum (74HCT Series) Low input current 1 mA maximum TTL compatible inputs Connection Diagram Dual-In-Line Package Truth Table Load H H L H Enable G L L X H Down Up L H