型号:SN74AS640NSR+SOP5.2
SN74AS640NSRE4
SN74AS640NSRG4
SN74AS641DW
SN74AS641DWE4
SN74AS641DWG4
SN74AS641DWR
SN74AS641DWRE4
SN74AS641DWRG4
SN74AS641N
SN74AS641NE4
SN74AS642N
SN74AS644N
SN74AS645DW
SN74AS645DWE4
SN74AS645DWG4
SN74AS645DWR
SN74AS645DWRE4
SN74AS645DWRG4
SN74AS645N
SN74AS645NE4
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