74LS04 Hex Inverter NOT Gate

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.

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

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.