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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7410 Datasheet PDF – Triple 3-Input NAND Gates – National

Part Number: 7410, 5410, DM5410, DM7410N

Function : Triple 3 Input NAND Gates

Package: DIP 14 Pin

Manufacturer: National Semiconductor


7410 NAND Gate


The 7410 is Triple 3-Input NAND Gates.

This device contains three independent gates each of which performs the logic NAND function.

A NAND gate is a type of digital logic gate that performs the operation of logical conjunction, or AND, followed by the operation of logical negation, or NOT.

In other words, a NAND gate produces a LOW output only when all of its inputs are HIGH, and produces a HIGH output for all other input combinations. It is represented by a symbol that looks like an AND gate followed by a small circle, which indicates the negation operation.

The truth table for a two-input NAND gate is:

Input A Input B Output
0 0 1
0 1 1
1 0 1
1 1 0

TTL 7410 is a type of integrated circuit (IC) that belongs to the 7400 series TTL logic family. It is a triple 3-input NAND gate with open collector outputs, meaning that the outputs can only sink current and cannot source it.

The TTL 7410 IC operates on a supply voltage of 4.75V to 5.25V and has a maximum propagation delay of 22 nanoseconds. It is commonly used in digital electronics for tasks such as signal processing, logic operations, and control systems.

Block Diagram :

7410 datasheet


1. Triple 3-input NAND gate with open collector outputs

2. Supply voltage range of 4.75V to 5.25V

3. Maximum propagation delay of 22 nanoseconds

4. High noise immunity

5. TTL-compatible input levels

6. Low power consumption

7. Alternate Military/Aerospace device (5410) is available.

8. Contact a National Semiconductor Sales Office/Distributor for specifications.

Truth Table

7410 Function Truth Table

7410 Datasheet PDF


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