7420 Dual 4-Input NAND Gate IC

The 7420 is a TTL logic IC containing two independent 4-input NAND gates in a single 14-pin DIP package. Each NAND gate has four inputs and one output, making it useful for digital circuits that require multiple input logic conditions. Key Features: IC Number: 7420 / 74LS20 Function: Dual 4-Input NAND Gate Number of Gates: 2 independent NAND gates Inputs per Gate: 4 Package: 14-pin DIP Logic Family: TTL Typical Supply Voltage: 5V Applications: Digital logic circuits, control systems, switching circuits, counters, automation, and educational electronics projects. How it works: A NAND gate produces a LOW (0) output only when all four inputs are HIGH (1). If any input is LOW (0), the output becomes HIGH (1). Logic expression: Y = NOT (A × B × C × D) In simple terms, the 7420 provides two separate 4-input NAND gates in one IC, making it useful for combining multiple digital signals and implementing complex logic functions.