The fan put of a 7400 NAND gate is

Solution (By Examveda Team)

Let's break down this question about the fan-out of a 7400 NAND gate!

First, let's understand the key terms:

1. 7400 NAND gate: This is a very common type of digital logic chip. It belongs to a family of chips called TTL, which stands for Transistor-Transistor Logic. The "74" in 7400 indicates it's a part of the standard 74-series TTL family.

2. Fan-out: Imagine you have one digital gate, like our NAND gate, and it's sending its output signal to the inputs of other gates. The fan-out is simply the maximum number of other gates' inputs that a single output gate can reliably drive without its signal getting too weak or distorted. If you connect too many gates, the output gate might not be able to supply enough electrical current, which could lead to incorrect voltage levels and make the other gates malfunction.

3. TTL (Transistor-Transistor Logic): This refers to a specific type of electronic circuitry used to build integrated circuits (chips) like the 7400. When we talk about fan-out in the context of TTL, we often specify it in terms of "TTL loads" or "TTL inputs." One "TTL load" means the input of one standard TTL gate.

Now, let's answer the question:

For standard 74-series TTL gates (like the 7400 NAND gate), the standard or typical fan-out is 10. This means that one 7400 NAND gate can safely drive the inputs of up to 10 other standard TTL gates without any issues regarding signal integrity.

Therefore, the fan-out of a 7400 NAND gate is 10 TTL.

The correct answer is Option D: 10TTL.