74LS08 AND Two Input Gate IC: Datasheet, Pinout and Voltage

The 74LS08 AND Gate IC is part of the 74XXYY IC family. The chip contains four AND gates, each with two inputs, hence the name QUADRUPLE 2- INPUT AND GATE. The gates in the chip are designed by SCHOTTKY TRANSISTORS for high-speed logic operations.

The 74LS08 AND gate IC's pin diagram is given below. This IC has 14 pins, each of which is described below along with its function.

74LS08 Pinout

74LS08 Symbol

74LS08 Footprint

SIGNETICS CORP 74LS08N technical specifications, attributes, parameters and parts with similar specifications to SIGNETICS CORP 74LS08N.

• Low power consumption

• Typical Rise Time: 18ns

• Typical Fall Time: 18ns

• Operating voltage range: +4.75 to +5.25V

• Recommended operating voltage: +5V

• Maximum supply voltage: 7V

• Maximum current allowed drawing through each gate output: 8mA

• TTL outputs

• Operating temperature: 0°C to 70°C

• Storage Temperature: -65°C to 150°C

• Digital Electronics

• Networking Devices

• Servers

• Memory Units

• ALU

• General-purpose AND logic operation

• Measuring Instruments

1. The chip is primarily employed when AND logic is required. The chip has four AND gates, and we can use one or all of them at the same time.

2. The chip is employed in systems that require both high speed and operation. As previously stated, SCHOTTKY TRANSISTORS built the gates on the chip to reduce gate switching delays. As a result, the chip can do high-speed AND operations.

3. The 74LS08 is one of the most affordable AND logic ICs on the market. It is extremely popular and widely available.

4. TTL outputs are provided by the chip, which is required in some systems.

To comprehend the 74LS08 AND gate IC, we must first comprehend the operation of a single AND logic gate. In general, an AND logic gate consists of three sorts of combinations, each of which has similar outputs on specific inputs.

Below is a diagram of a transistor-based logic AND gate circuit. Two transistors are utilized as switches in the following circuit to change the output condition for different inputs. Both transistors in the IC 74LS08 AND logic gate are linked in series. The power is applied to the collector terminal of the first transistor, and the output is obtained at the emitter terminal of the second transistor.

74LS08 Input Voltage

The two inputs are connected to the base terminal of both transistors. The inputs allow the current to travel between the two transistors. When the input signal is HIGH, current flows through the transistor, resulting in full voltages on the o/p pin.

In other cases, if one of the circuit's input pins is LOW, the o/p will also be LOW due to the current supply from the transistors. The output here will not be dependent on the type of AND gate, but will always be determined by the truth table of the AND gate, which is shown below.

A single AND gate or a combination of two AND gates cannot be used to create another logic gate, however, an AND logic gate can be used to create additional logic gates.

With just one NOT gate, an AND logic gate can be changed to a NAND logic gate. Other logic gates, such as XNOR and XOR, rely on AND logic gates; nevertheless, OR and NOT logic gates are required to create other logic gates.

74LS08 Dimensions

Signetics is an American electronics manufacturer specifically established to make integrated circuits. Founded in 1961, they went on to develop several early microprocessors and support chips, as well as the widely used 555 timer chip. They were bought by Philips in 1975 and incorporated in Philips Semiconductors (now NXP).