STMicroelectronics M74HC20B1 2-ch, 4-input bipolar NAND gates Integrated Circuit

STMicroelectronics M74HC74B1 dual D flip-flop set/reset Integrated Circuit

Fairchild 7420PC dual 4-input bipolar NAND gates Integrated Circuit

10x STMicroelectronics HCF4082BE Dual 4-Input NAND Gate IC DIP-14 CMOS NOS

Texas Instruments SN7420N dual 4-input NAND gates Integrated Circuit

Signetics 7420N dual 4-input bipolar NAND gates Integrated Circuit

Signetics 74LS20N dual 4-input bipolar NAND gates Integrated Circuit