2input

2input is a term used in electronics and computer engineering to describe devices, circuits, or software components that accept exactly two input signals. In digital logic, "2-input" commonly refers to gates and small combinational blocks with two binary inputs. The most familiar two-input gates are AND, OR, XOR, and their complements (NAND, NOR, XNOR). The concept also covers two-input multiplexers, comparators, and many two-data-path blocks used in broader circuit designs. In software, two-input operands appear in binary operators such as addition, subtraction, logic comparison, and in functions that take two arguments like max(a,b) or min(a,b).

Implementation is by combining simpler primitives. Two-input components can be built from universal gates such as NAND or NOR, or from dedicated two-input cells in standard-cell libraries. In field-programmable logic and application-specific integrated circuits, the two inputs influence routing, propagation delay, and power consumption. Timing and electrical constraints are common considerations when integrating two-input structures into larger designs.

Applications span education, digital design, and signal processing, where two-input blocks serve as fundamental building blocks for more complex logic or arithmetic units. In hardware description languages, modeling a two-input function is a common starting point for describing combinational logic or simple data-path operations. In software, two-input constructs are ubiquitous across programming languages as binary operators and functions.

The term "2input" is not a formal standard with a single specification; rather it is a generic label used to describe any component or concept that operates on two inputs. Its meaning is context-dependent, varying with hardware versus software domains and with the particular design or application being discussed.