DM74LS40 - Dual 4-Input NAND Buffer
This device contains two independent gates each of which perform the logic NAND function Connection Diagrams Dual-In-Line Package TL F 10171 * 1 Order Number DM74LS40M or DM74LS40N See NS Package Number M14A or N14A Function Table (Each Gate) Inputs A H L X X X B H X L X X C H X X L X D