74LS08 Quadruple 2-Input AND Gate IC
- Operating voltage range: +4.75 to +5.25V
- Recommended operating voltage: +5V
- Maximum supply voltage:7V
- Maximum current allowed to draw through each gate output: 8mA
- TTL outputs
- Low power consumption
- Typical Rise Time: 18ns
- Typical Fall Time: 18ns
- Operating temperature:0°C to 70°C
- Storage Temperature: -65°C to 150°C
In stock
₨ 40
In stock
Where to Use 74LS08 IC
There are many applications of IC 74LS08. A few mentioned below.
1. The chip is basically used where AND logic operation is needed. There are four AND gates in the chip, we can use one or all gates simultaneously.
2. The chip is used in systems where high speed AND operation is needed. As mentioned earlier the gates in the chip are designed by SCHOTTKY TRANSISTORS to make the switching delays of gates less. Because of this the chip can be used for high speed AND operations.
3. 74LS08 is one of cheapest IC present in market for AND logic operation. It is really popular and is available everywhere.
4. The chip provides TTL outputs which are needed in some systems.
The truth table of AND gate is given as,
| Input1 | Input2 | AND Output |
| LOW | LOW | LOW |
| HIGH | LOW | LOW |
| LOW | HIGH | LOW |
| HIGH | HIGH | HIGH |
74LS08 Pin configuration
74LS08 is a 14 PIN IC. The chip is available in different packages and is chosen depending on requirement. The description for each pin is given below.
| Pin Number | Description |
| AND GATE 1 | |
| 1 | A1-INPUT1 of GATE 1 |
| 2 | B1-INPUT2 of GATE 1 |
| 3 | Y1-OUTPUT of GATE1 |
| AND GATE 2 | |
| 4 | A2-INPUT1 of GATE 2 |
| 5 | B2-INPUT2 of GATE 2 |
| 6 | Y2-OUTPUT of GATE2 |
| AND GATE 3 | |
| 9 | A3-INPUT1 of GATE 3 |
| 10 | B3-INPUT2 of GATE 3 |
| 8 | Y3-OUTPUT of GATE3 |
| AND 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 |
