Fan-in is the number of inputs a logic gate can handle. For instance the fan-in for the AND gate shown in the figure is 3. Physical logic gates with a large fan-in tend to be slower than those with a small fan-in. This is because the complexity of the input circuitry increases the input capacitance of the device. Using logic gates with higher fan-in will help reducing the depth of a logic circuit.
- Fan-out, a related concept, which is the number of logic inputs that a given logic output drives.
- Joseph Cavanagh (21 December 2017). Digital Design and Verilog HDL Fundamentals. CRC Press. pp. 3–. ISBN 978-1-351-83456-8.
- Dimitrios Soudris; Peter Pirsch; Erich Barke (29 June 2003). Integrated Circuit Design: Power and Timing Modeling, Optimization and Simulation: 10th International Workshop, PATMOS 2000, Göttingen, Germany, September 13-15, 2000 Proceedings. Springer. pp. 274–. ISBN 978-3-540-45373-4.
- Singh Ajay Kumar (30 June 2010). Digital Vlsi Design. PHI Learning Pvt. Ltd. pp. 138–. ISBN 978-81-203-4187-6.
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