型号:SN74LVT574DBR+LX574
SN74LVT574DBRG4
SN74LVT574DW
SN74LVT574DWR
SN74LVT574PW
SN74LVT574PWR
SN74LVT8980ADW
SN74LVT8980ADW 
SN74LVT8980ADWR
SN74LVT8980ADWRG4
SN74LVT8980AIDWREP
SN74LVT8980DW
SN74LVT8980DWR
SN74LVT8986GGV
SN74LVT8986PM
SN74LVT8986ZGV
SN74LVT8996DW
SN74LVT8996DWR
SN74LVT8996IPWREP
SN74LVT8996PW
SN74LVT8996PWR
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