SN74LS6421N规格参数
相关型号
SN74LS642-1N SN74LS6421NE4 SN74LS642-1NE4 SN74LS642DW SN74LS642DWE4 SN74LS642DWG4 SN74LS642N SN74LS642NE4 SN74LS642NG4 SN74LS642NSR