Logic Gates 74LS Series 74LS04 Inverter not gate

74LS04 Hex Inverter NOT Gate

By David Joseph Dec 18, 2021

The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC. 74LS04 Hex Inverter contains six independent inverters. An inverter basically inverts the logic input signal.

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74LS04 Features

Six Independent Invert Gates
Standard Pin Configuration
Also Available in SMD Type
Operating Temperature to 70°C
Standard TTL Switching Voltages

74LS04 Specifications

Supply Voltage	4.75 - 5.25Vdc
Maximum Clock Frequency	40Mhz
Power Dissipation	2mW/gate @100kHz
Minimum Output Current	8mA
Propagation Delay	10nS
Fan Out (TTL Loads)	20

74LS04 Pinout Diagram

74LS04 Pin Description

Pin No	Pin Name	Description
1	A1	Inverter Gate 1 Input
2	B1	Inverter Gate 1 Output
3	A2	Inverter Gate 2 Input
4	B2	Inverter Gate 2 Output
5	A3	Inverter Gate 3 Input
6	B3	Inverter Gate 3 Output
7	GND	Ground
8	B4	Inverter Gate 4 Output
9	A4	Inverter Gate 4 Input
10	B5	Inverter Gate 5 Output
11	A5	Inverter Gate 5 Input
12	B6	Inverter Gate 6 Output
13	A6	Inverter Gate 6 Input
14	VCC	Positive Supply

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74LS04 Circuit

Here is a simple circuit of NOT gate implementation using one NPN transistor and two resistors of 1-10k value.

Applications

Adjustable-speed ac motor drives.
Uninterrupted power supplies (UPS)
Running appliances of ac used in an automobile battery.

74LS04 Alternative Equivalent

74LS05, 74LS06, 74LS07, 74LS14

Download 74LS04 Hex Inverter Datasheet from the link given below.

Download Datasheet