贴片直插MC74HC240ADW，MC74HC175FL2，MC74HC175FR1，4

启航MC74HC240ADW电子元器件芯片

MC74HC240ADW MC74HC240ADWG MC74HC240ADWR2G

MC74HCT573ANG/MC74HC240AN/MC74HC240ADW

贴片直插MC74HC244ADW，MC74HC175FR2，MC74HC240ANG，4