SN74HC191N
Manufacturers：
Texas Instruments
Description：
IC 4-BIT UP/DN BIN CNTR 16-DIP
SN74HC191NE4
Manufacturers：
Texas Instruments
Description：
IC COUNTER 4BIT SYNC BIN 16-DIP
SN74HC191NSR
Manufacturers：
Texas Instruments
Description：
IC BINARY COUNTER UP/DOWN 16SO