SN74S51DR
Manufacturers：
Texas Instruments
Description：
IC DUA AND-OR-INVERT GATE 14SOIC
SN74S51DRE4
Manufacturers：
Texas Instruments
Description：
IC 2-IN AND-OR-INV GATE 14-SOIC
SN74S51DRG4
Manufacturers：
Texas Instruments
Description：
IC DUAL 2IN AND/OR 14SOIC