- 54LS20
Dual 4-Input NAND Gates - 54LS20/B2C
Dual 4-input NAND Gate - 54LS20DM
Dual 4-input NAND Gate - 54LS20DMQB
Dual 4-Input NAND Gates - 54LS20FMQB
Dual 4-Input NAND Gates - 54LS20LMQB
Dual 4-Input NAND Gates - 54LS21
DUAL 4-INPUT POSITIVE GATE - 54LS21DM
DUAL 4-INPUT POSITIVE GATE - 54LS21DMQB
Dual 4-input AND Gate - 54LS21FM
DUAL 4-INPUT POSITIVE GATE - 54LS21FMQB
Dual 4-input AND Gate - 54LS21LMQB
Dual 4-input AND Gate - 54LS22
DUAL 4-INPUT NAND GATE (WITH OPEN-COLLECTOR OUTPUT) - 54LS22DMQB
DUAL 4-INPUT NAND GATE (WITH OPEN-COLLECTOR OUTPUT) - 54LS22FMQB
DUAL 4-INPUT NAND GATE (WITH OPEN-COLLECTOR OUTPUT)