CD54HC190, CD74HC190 CD54HC191, CD74HC191, CD54HCT.
Texas Instruments
CD74HC191 - Synchronous Up/Down Counters
CD54HC190, CD74HC190 CD54HC191, CD74HC191, CD54HCT191, CD74HCT191 SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL SCHS275E − MARCH 2002 − REVIS.
