- 74LS20
Dual 4-Input NAND Gate - 74LS20DC
Dual 4-input NAND Gate - 74LS20PC
Dual 4-input NAND Gate - 74LS20SC
Dual 4-input NAND Gate - 74LS21
Dual 4-input Positive Gates - 74LS21DC
DUAL 4-INPUT POSITIVE GATE - 74LS21FC
DUAL 4-INPUT POSITIVE GATE - 74LS21PC
DUAL 4-INPUT POSITIVE GATE - 74LS22
DUAL INPUT POSITIVE NAND GATES WITH OPEN COLLECTOR OUTPUTS - 74LS221
POWER SCHOTTKY - 74LS221N
DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS - 74LS240
POWER SCHOTTKY - 74LS240DC
Dual 4-Bit Inverting Buffer/Driver - 74LS240PC
Dual 4-Bit Inverting Buffer/Driver - 74LS240SC
Dual 4-Bit Inverting Buffer/Driver