The 4068 is a member of the 4000 Series CMOS range, and contains a single 8-input NAND gate, and, on some models the inverted output (i.e. an AND gate). The pinout diagram, given on the right, is the standard eight-input CMOS logic gate IC layout:
- Pin 7 is the ground supply (GND)
- Pin 14 is the positive supply (VDD)
- Pins 2-5 and 9-12 are gate inputs for the gate
- Pin 1 and 13 are gate outputs. Pin 1 is not always available.
- Pin 6 and 8 are not connected.

The NAND gate gives a high output for any combination of inputs, except when all inputs are high. The AND gate only gives a high when all inputs are high.
        Q = A ⋅ B ⋅ C ⋅ D ⋅ E ⋅ F ⋅ G ⋅ H
        Q ¯ = A ⋅ B ⋅ C ⋅ D ⋅ E ⋅ F ⋅ G ⋅ H

This chip is widely available, and usually comes in a DIL-14 or SOIC-14 package.

An 8-input NAND gate is available as the TTL 7430, but no AND gate is available.

How to use CD4068:
TO use the CD4068 IC, just power it using the Vcc (pin 14) and ground (pin 7) lines. The typical operating voltage of the IC is +5V, but it can also be operated in +5V, +10V, and +15V. The output voltage of the IC on the pin J and K will be equal to the operating voltage of the IC. As per the truth table is shown above, the NAND gate will be high in every condition except the last one in which all the inputs are high. On the other hand AND gate will be LOW in every condition except the last condition when all the inputs are high.

Equivalent for CD4068: HCF4068

Boolean Function functions of NAND and AND gate are the opposite.