What is meant by the fan-out of a logic gate?

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URSC ISRO Technical Assistant Electronics 13 November 2016 Official Paper
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  1. The number of other gates that can be connected to the gate’s output
  2. The physical distance between the output pins on the device
  3. The number of other gates that can be connected to one of the gate’s inputs
  4. The amount of cooling required by the gate

Answer (Detailed Solution Below)

Option 1 : The number of other gates that can be connected to the gate’s output
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Detailed Solution

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While choosing a particular digital IC for an application, its specifications or characteristics should be taken into account.

The main specifications for logic families are as follows:

Fan-in: The number of inputs that can be connected to a logic gate is called its ‘Fan-in’.

Fan-outThe number of units that can be connected to the output of a logic gate is called its ‘Fan-out’.

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Propagation DelayThe time taken by a ‘gate’ in propagating an input signal to the output of the gate is called ‘propagation delay’. It is measured in Nanoseconds (10-9sec.).

Logic Voltage LevelThe specification of voltages corresponding to logic ‘0’ and ‘1’ are called logic voltage levels
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