What is 74LS244? – Octal Buffer and Line Driver

What is 74LS244?

This is a type of integrated circuit chip known as a buffer/line driver. It is designed to provide high-speed signal buffering and amplification in a variety of electronic applications.

1. High-speed signal transfer: It is designed to operate at high speeds, making it suitable for use in applications that require fast signal transfer.

2. Low power consumption: The chip is designed to operate with a low power consumption, making it suitable for use in battery-powered devices.

3. High output current: It can provide a high output current, making it suitable for use in applications that require a strong signal.

4. Easy to use: This is easy to use and requires minimal external components, making it a popular choice for beginners and hobbyists.

5. Multiple outputs: The chip can provide eight buffered outputs.

Part Number: 74LS244

Function: Octal Buffers and Line Drivers With 3-State Outputs

Package: DIP 20 Pin, LCCC 20 Pin Type

Manufacturer: Texas Instruments

Image and pinouts :

74LS244 Datasheet Pinout


These octal buffers and line drivers are designed specifically to improve both the performance and density of three-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The designer has a choice of selected combinations of inverting and noninverting outputs, symmetrical, active-low output-control (G)\ inputs, and complementary output-control (G and G\) inputs. These devices feature high fan-out, improved fan-in, and 400-mV noise margin. The SN74LS’ and SN74S’ devices can be used to drive terminated lines down to 133 Ω.

Advantages Vs Disadvantages

1. High-speed signal transfer makes it useful for fast signal processing.

2. Low power consumption makes it ideal for use in battery-powered devices.

3. Easy to use and requires minimal external components.

4. Multiple outputs make it suitable for use in a variety of applications.


1. The 74LS244 is an older technology and may not be suitable for use in some modern electronic applications that require more advanced features and specifications.

2.  It has a limited operating temperature range.

3. It may not be suitable for use in high-voltage applications.


  • 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers
  • PNP Inputs Reduce DC Loading
  • Hysteresis at Inputs Improves Noise Margins



• Servers

• LED Displays

• Network Switches

• Telecom Infrastructure

• Motor Drivers

Some similar: 74LS541, 74LS245, and 74LS573.

74LS244 Datasheet

74LS244 pdf