Home / Standards / GB/T 3432.4-1989 GB/T 3432.4-1989 Abolished Series and productsfor TTL semiconductor integrated circuits--Products of series 54/74 LS 半导体集成电路TTL电路系列和品种 54/74LS系列的品种 Standard Type GBT ICS 31.200 CCS L56 Status 废止 Issue Date 1989-03-31 Implementation 1990-04-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A