74LS02芯片.pdf 54LS02 DM54LS02 DM74LS02 Quad 2-Input NOR Gates June 1989 54LS02 DM54LS02 DM74LS02 Quad 2-Input NOR Gates General Description Features This device contains four independent gates each of which Y Alternate Military Aerospace device (54LS02) is avail- performs the logic NOR function able Contact a National Semiconductor Sales Office ……