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74LV244ARP74LV244APW74LV244DWR74LV244MSA
74LV1G17GW74LV1G11GW74LV21APWR74LV240APW
74LV240PW74LV21APW74LV241DB74LV241PW
原装进口贴片SN74LV244APWTSSOP
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