贴片直插MC74VHC541MEL，MC74VHC540ML1，MC74VHC541DWG，4

MC74VHC541MEL【IC BUF NON-INVERT 5.5V SOEIAJ-20】

丝印MC74VHC573MEL-MC74VHC573DTG-MC74VHC541DTR-MC74VHC541DTG