正品DM74S288AV DM74S288AN DM74S287AN DM74S189AN DM74S188AN
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贴片直插DM74S288AJ，DM74S287AV，DM74S188AV，DM74S287AJ，6
贴片直插DM74S472AJ，DM74S387AV，DM74S288AV，DM74S387AJ，6
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