SN74LS540N
Manufacturers：
Texas Instruments
Description：
IC INVERTER 8-INPUT 20DIP
SN74LS540NE4
Manufacturers：
Texas Instruments
Description：
IC INVERTER 8-INPUT 20DIP
SN74LS540NSR
Manufacturers：
Texas Instruments
Description：
IC BUFF/DVR 3-ST OCTAL 20SO