CD4011 - Quad 2-Input NAND Gate IC
The CD4011 is a quad package 2-Input NAND gate IC(Integrated Circuits). That is, it has four NAND gates inside a single package and each gate has two input lines and one output line. All the inputs and outputs are buffered and this improves transfer characteristics by providing a very high gain.
The CD4011 IC operates at 5V, 10V, 15V, and even 20V. When operating at 5V the maximum low-level input voltage is 0.5 and the minimum high-level input voltage is 4.5. All four gates share the same power rail but can operate independently.
Pinout:

Pinout Of CD4011 IC