DM74LS20 Dual 4-Input NAND Gate
DM74LS20J Dual 4-input NAND Gate
DM74LS20J/A+ Dual 4-input NAND Gate
DM74LS20M Dual 4-Input NAND Gate
DM74LS20MX Dual 4-input NAND Gate
DM74LS20N Dual 4-Input NAND Gate
DM74LS20N/A+ Dual 4-input NAND Gate
DM74LS20N/B+ Dual 4-input NAND Gate
DM74LS21 Dual 4-Input Gates
DM74LS21J Dual 4-input AND Gate
DM74LS21J/A+ Dual 4-input AND Gate
DM74LS21M Dual 4-input AND Gate
DM74LS21N Dual 4-input AND Gate
DM74LS21N/A+ Dual 4-input AND Gate
DM74LS21N/B+ Dual 4-input AND Gate