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SN75ALS191PG4(LS192DRG4 LS192NG4 LS193NG4 LS194NG4
贴片直插SN74LS193MG/SN74LS175DG/SN74LS169MG/SN74LS174NG/4
贴片直插SN74LS221NG/SN74LS195AN/SN74LS193DG/SN74LS194AN/4
贴片直插SN74LS240HG/SN74LS240FN/SN74LS193NG/SN74LS240DW/4
