SN74HC257N
Manufacturers：
Texas Instruments
Description：
IC QUAD 2-TO-1 SEL/MUX 16-DIP
SN74HC257NE4
Manufacturers：
Texas Instruments
Description：
IC SELECTOR/MUX QD 2-1 16-DIP
SN74HC257NSR
Manufacturers：
Texas Instruments
Description：
IC QUAD 2-TO-1 SEL/MUX 16SO