CD4011 is a member of the CD40xx CMOS IC series. The CD4011 IC contains four independent NAND gates. The devices perform the Boolean function Y = A × B or Y = A + B in positive logic. This IC is used in AV Receivers, Portable Audio Docks, and Blu-Ray Players.
SN54LS00 is a member of the SNx4xx00 IC series. It contains of four independent NAND gates inside a single package. The devices perform the Boolean function Y = A × B or Y = A + B in positive logic.
The CD74HCT20M is a high speed CMOS Logic dual 4-input NAND Gate. The logic gates utilize silicon gate CMOS technology to achieve operating speeds similar to LSTTL gates with the low power consumption of standard CMOS integrated circuits.
The CD4012 is a CMOS technology based, 4-input NAND gate Dual package, i.e. the IC has two NAND gates which can operate independently and each gate can take in four Inputs. It is commonly used in buffer circuits, logic inverter circuits etc.
74LS00 is a member of 74XXYY IC series. The 74xxyy ICs are logic gates of digital electronics. 74LS00 IC has four NAND gates. Also each gate has two inputs.