贴片直插SN74LS244MR1G，SN74LS244MELG，SN74LS244ML1G，4

贴片直插SN74LS245MR1G，SN74LS244ML2G，SN74LS245MELG，4

贴片直插SN74LS244DWR2，SN74LS240ML2G，SN74LS240MR1G，4