What is Fan In and Fan out ?
Fan-in: Fan-in represents the number of inputs that a component or system can accept. It indicates how many different sources or inputs are connected to a particular component. For example, in a logic gate, fan-in refers to the number of input signals it can accept.
If number of input exceeds,the output will be undefined or incorrect .it is specified by manufacturer and is provided in the datasheet.
Fan-out: Fan-out, on the other hand, refers to the number of outputs that a component or system can produce. It indicates how many different destinations or outputs can be driven by a particular component. In the case of a logic gate, fan-out refers to the number of gates or components that can be connected to its output.
The fan out is defined as the maximum number of input that can connected to the output of a gate wothout degrading the normal operation. Gate with large fan out are slower.Fan out calculated from the amount of current available in the output gate and the amount of current needed in each input.
Summary
Both fan-in and fan-out are important considerations in designing and analyzing systems. They help determine the complexity, scalability, and performance characteristics of a system. Higher fan-in can lead to increased complexity, while higher fan-out can affect the load on a component and its ability to drive multiple outputs effectively. In summary, fan-in and fan-out are terms used to describe the number of inputs and outputs, respectively, of a component or system, providing insights into its connectivity and capabilities.