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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