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74HC242DBSSOP2074HC240PRENESAS74HC238PW全新
00HC74全新
74HC242AP74HC241PW74HC242B174HC243AP
74HC24274HC24174HC24374HC244
74HC242N74HC242A74HC243D74HC243E
SN74HC242NSN74HC241NSN74HC243DSN74HC243N
SN74HC240SN74HC221SN74HC241SN74HC242
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