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


74ALVCH162244 Datasheet – 16-Bit Buffer / Line Driver

What is 74ALVCH162244?

This is a 16-bit buffer/line driver IC designed to operate at a low voltage of 1.65V to 3.6V. It features 16 output channels, each of which can sink or source up to 24mA of current, making it suitable for driving a variety of loads, including capacitive loads.

The 74ALVCH162244 is designed to work in a variety of applications, such as memory interfacing, bus buffering, and signal distribution. It has a tri-state output, which allows the outputs to be disconnected from the bus, making it suitable for bus-oriented applications.

Function: Low Voltage 16-Bit Buffer/Line Driver with Bushold and 26Ω Series Resistor in Outputs

Package: TSSOP 48 Pin type

Manufacturer: Fairchild Semiconductor


74ALVCH162244 datasheet



The 74ALVCH162244 contains sixteen non-inverting buffers with 3-STATE outputs to be employed as a memory and address driver, clock driver, or bus oriented transmitter/receiver.

The device is nibble (4-bit) controlled. Each nibble has separate 3-STATE control inputs which can be shorted together for full 16-bit operation. The ALVCH162244 data inputs include active bushold circuitry, eliminating the need for external pull-up resistors to hold unused or floating data inputs at a valid logic level The 74ALVCH162244 is also designed with 26Ω series resistors in the outputs.

This design reduces line noise in applications such as memory address drivers, clock drivers, and bus ransceivers/transmitters. The 74ALVCH162244 is designed for low voltage (1.65V to 3.6V) VCCapplications with output capability up to 3.6V. The 74ALVCH162244 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining low CMOS power dissipation.

Block Diagram

74ALVCH162244 Block Diagram


1. 1.65V to 3.6V VCCsupply operation
2. 3.6V tolerant control inputs and outputs
3. Bushold on data inputs eliminates the need for external pull-up/pull-down resistors
4. 26Ωseries resistors in outputs
5. tPD
(1) 4.2 ns max for 3.0V to 3.6V VCC
(2) 4.9 ns max for 2.3V to 2.7V VCC
(3) 7.6 ns max for 1.65V to 1.95V VCC
6. Uses patented noise/EMI reduction circuitry
7. Latch-up conforms to JEDEC JED78
8. ESD performance :
(1) Human body model >2000V
(2) Machine model >200V


74ALVCH162244 Datasheet PDF

74ALVCH162244 pdf

Other data sheets are available within the file: 74ALVCH162244T