SN74LS221N SN74HC221N DIP16脚 全新多谐振荡器芯片 直插IC

SN 74HC237 74HC139 74HC243 74HC32 74HC590 D PW R 118 221N

HD/SN74HC221/HC237/HC251/HC253/HC257/HC258/HC259 N P DIP16

SN74LS221N SN74HC174N SN74HC595N CD74ACT253E

全新SN74HC238N SN74HC237N SN74HC237M SN74HC224N SN74HC221D

SN74LS253N MB90P653APF-G HD10116 74HC221

贴片直插SN74LS221N SN74HCT74N SN74HC595N SN74HC74DR 5