HD74LS00 PDF Datasheet – Quadruple 2-Input NAND Gates

Part Number: HD74LS00

Function: Quadruple 2-Input NAND Gates

Package: DIP, SOP 14 Pin Type

Manufacturer: Hitachi Semiconductor

Images:HD74LS00 pdf pinout


HD74LS00 is Quadruple 2-Input NAND Gates. The “HD74LS00” is a part number that refers to a specific integrated circuit (IC) chip. It is part of the 74LS00 series, which is a family of integrated circuits that includes various logic gates.

1. Function: The 74LS00 is a digital logic IC that contains four separate 2-input NAND gates. Each gate has two inputs and one output. The output of each gate is the result of the NAND logic operation applied to its two input signals.

2. Logic Symbol: The logic symbol for a 2-input NAND gate typically looks like a small rectangle with two inputs on the left side and an output on the right side.

3. Applications: NAND gates, including the ones in the 74LS00, are fundamental building blocks in digital electronics. They can be used to perform a variety of logic functions and are commonly used in the design of digital circuits for tasks like signal inversion, signal buffering, and more complex logic operations.

HD74LS00 datasheet ttl

HD74LS00 PDF Datasheet

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74LS20 Datasheet PDF – Dual 4-Input Positive-NAND Gate

What is 74LS20?

This  is a digital integrated circuit that contains two 4-input NAND gates. It is a member of the 74LS family of ICs and is commonly used in digital logic applications to perform logical operations such as AND, OR, and NOT.

One of the advantages of the 74LS20 is its fast switching speed and low power consumption. It is also designed to operate over a wide temperature range, making it suitable for use in various environments.


Package: DIP 14 Pin Type

Manufacturer: Texas Instruments

Image and Pinouts:

74LS20 datasheet



These Devices contain two independent 4-input NAND gates. This device contains two independent gates each of which performs the logic NAND function.

Official Homepage: https://www.ti.com/product/SN74LS20

Function Table

A   B   C   D   Y
X   X   X   L   H
X   X   L   X   H
X   L   X   X   H
L   X   X   X   H
H   H   H  H   L




One of the disadvantages of the SN74LS20 is its limited number of inputs per gate. For more complex applications, multiple ICs might be needed to perform the desired logical operation. Additionally, as with any digital IC, attention must be given to the voltage levels and timing requirements to ensure proper operation.

Other data sheets are available within the file: SN74LS20, SN74S20, SN7420, 7420, SN54LS20

74LS20 Datasheet PDF Download

74LS20 pdf

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