7421

74系列文档资料，对数字电路设计尤为重要，特别适合新手
54LS21 DM54LS21 DM74LS21 Dual 4-Input AND Gates
June 1989




54LS21 DM54LS21 DM74LS21 Dual 4-Input AND Gates
General Description Features
This device contains two independent gates each of which Y Alternate Military Aerospace device (54LS21) is avail-
performs the logic AND function able Contact a National Semiconductor Sales Office