SN74LS642-1DWE4规格参数
相关型号
SN74LS6421DWG4 SN74LS642-1DWG4 SN74LS6421N SN74LS642-1N SN74LS6421NE4 SN74LS642-1NE4 SN74LS642DW SN74LS642DWE4 SN74LS642DWG4 SN74LS642N