型号:SN74HC595R
SN74HC620N
SN74HC623DW
SN74HC623DWG4
SN74HC623DWR
SN74HC623DWRE4
SN74HC623DWRG4
SN74HC623N
SN74HC623NE4
SN74HC623NS
SN74HC623NSE4
SN74HC623NSG4
SN74HC623NSR
SN74HC623NSRE4
SN74HC623NSRG4
SN74HC640AN
SN74HC640ANE4
SN74HC640ANS
SN74HC640ANSE4
SN74HC640ANSG4
SN74HC640ANSR
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