SN74LS193N
Manufacturers：
Texas Instruments
Description：
IC 4-BIT UP/DOWN COUNTER 16-DIP
SN74LS193NE4
Manufacturers：
Texas Instruments
Description：
IC 4-BIT UP/DOWN COUNTER 16-DIP
SN74LS193NSR
Manufacturers：
Texas Instruments
Description：
IC SYNC 4-BIT UP/DN CNTR 16SO