74LS00

74LS00 is a member of 74XXYY IC series. The 74xxyy ICs are logic gates of digital electronics. 74LS00 IC has four NAND gates. Also each gate has two inputs. Hence name QUAD TWO INPUT NAND GATE.

74LS00 Pin Configuration
74LS00 is a 14 PIN device. The chip is available in different packages and is chosen depending on requirement. The description for each pin is given below.

Pin Number

Description

NAND GATE 1

1

A1-INPUT1 of GATE 1

2

B1-INPUT2 of GATE 1

3

Y1-OUTPUT of GATE1

NAND GATE 2

4

A2-INPUT1 of GATE 2

5

B2-INPUT2 of GATE 2

6

Y2-OUTPUT of GATE2

NAND GATE 3

9

A3-INPUT1 of GATE 3

10

B3-INPUT2 of GATE 3

8

Y3-OUTPUT of GATE3

NAND GATE 4

12

A4-INPUT1 of GATE 4

13

B4-INPUT2 of GATE 4

11

Y4-OUTPUT of GATE4

SHARED TERMINALS

7

GND- Connected to ground

14

VCC-Connected to positive voltage to provide power to all four gates

74LS00 Features and Specifications:

• Operatingvoltage range: +4.75 to +5.25V
• Maximum supply voltage:7V
• Maximum current allowed to draw through each gate output: 8mA
• TTL outputs
• Maximum ESD: 3.5KV
• Typical Rise Time: 15ns
• Typical Fall Time: 15ns
• Operating temperature:0°C to 75°C

74LS00 Equivalents
SN54LS00, SN7400, CD4011, Any two transistors can be reconfigured to form a NAND gate.

Where 74LS00 IC is Used?

There are many reasons of using 74LS00 in electronic circuits. Here are a few examples where it is used.

1. 74LS00 basically used for performing NAND function. The IC has four NAND gates in it. Each gate can be used separately.

2. When you want logic inverter. NAND gates in this chip can be reconfigured to make them NOT gate. So we can make 74ls00 a four NOT gate chip if necessary.

3. Where high speed NAND operation is necessary. This chip has less transition times which are needed for high speed applications. So 74LS00 can be used in high frequency systems.

4. 74LS00 is one of the cheapest IC. It is really popular and is available everywhere.

Applications:

• General purpose logic
• Digital Electronics
• PCs and notebooks
• Servers
• ALUs
• Networking
• Digital systems