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SN74S189AN SN74S189N SN74S189BN 进口原装现货
贴插SN74S189AN-MSM6521-13-DS2012R-50-MC74BC373P-B
贴片直插SN75189ADR,SN74S189AN,SN74LS688N,SN74LS74AN,4
贴片直插SN74S189AN SN74S139AN SN74LS399N SN74LS682N 5
贴片直插SN75157DE4 SN74TL074C SN74S1051D SN74S189AN 5
IC逻辑芯片集成电路TI