This post explains for the **TTL** (Transistor-Transistor Logic) .

The Part Number is 7400, DM74LS00M, DM74LS00SJ, DM74LS00N.

The function of this IC is Quad 2-Input NAND Gate.

The package is DIP, SOP 14 Pin Type

Manufacturer: Fairchild Semiconductor

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## Description

The **7400** TTL IC is a quad two-input NAND gate, meaning it contains four individual NAND gate circuits, and each gate has two inputs.

This device contains four independent gates each of which performs the logic NAND function. Quad 2-Input NAND Gate.

1. Function: This IC is primarily used for digital logic operations and performs the NAND (NOT-AND) logic function. Each NAND gate has two inputs and one output, and it produces an output logic low (0) when both inputs are logic high (1), and produces an output logic high otherwise.

2. Inputs and Outputs: The IC consists of four independent NAND gates, denoted as gate 1 (1A, 1B, 1Y), gate 2 (2A, 2B, 2Y), gate 3 (3A, 3B, 3Y), and gate 4 (4A, 4B, 4Y). Each gate has two inputs (A and B) and one output (Y).

3. Voltage and Power Supply: The TTL operates with a typical power supply voltage (VCC) of 5V and has a wide voltage range compatibility with TTL logic levels.

The **7400 IC** and the entire 7400 series are widely used in digital logic circuits, computer systems, microcontrollers, and other applications requiring logical operations. By combining multiple 7400 ICs or using other ICs in the 7400 series, more complex digital logic functions can be implemented.

It’s worth noting that there are various subtypes and variants within the 7400 series, such as the 7404 (hex inverter), 7408 (quad two-input AND gate), and 7432 (quad two-input OR gate), each offering different logical functions.

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