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SN74LS540D SOP-20 缓冲/驱动/接收/收发器芯片IC
贴片直插SN74LS123J SN74HCT00N SN74HC245N SN74HC540D 5
SN74LS540D 缓冲器/驱动器/收发器 SN74LS540D SOP-20
SN74LS540D(LX) SOP-20 缓冲器/驱动器/收发器
