Encyclopedia Entry: 74ACT244TTR

Product Overview

Category

The 74ACT244TTR belongs to the category of integrated circuits (ICs) and specifically falls under the family of octal buffer/line drivers.

Use

This IC is primarily used for signal buffering and line driving applications in digital electronic systems. It provides a high-speed, non-inverting buffer with 3-state outputs, making it suitable for various digital logic designs.

Characteristics

• High-speed operation: The 74ACT244TTR offers fast propagation delays, enabling efficient data transfer.
• Non-inverting buffer: It maintains the input logic state at the output, ensuring signal integrity.
• 3-state outputs: The IC supports three output states - high impedance, logic high, and logic low - allowing multiple devices to share a common bus without interference.
• Wide operating voltage range: It can operate within a voltage range of 2V to 6V, making it compatible with different power supply levels.
• Low power consumption: The IC is designed to consume minimal power, enhancing energy efficiency.

Package and Quantity

The 74ACT244TTR is available in a small-outline transistor (SOT) package, specifically SOT-163. It is supplied in tape and reel packaging, which facilitates automated assembly processes. Typically, it is sold in quantities of 2500 units per reel.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Propagation Delay: 5.5 ns
• Maximum Output Current: ±24 mA

Pin Configuration

The 74ACT244TTR IC consists of 20 pins, arranged as follows:

__ __ A1 |1 `--' 20| VCC B1 |2 19| B2 A2 |3 18| A3 B3 |4 17| B4 A4 |5 74 16| A5 B5 |6 ACT244 15| B6 A6 |7 TTR 14| A7 B7 |8 13| B8 GND |9 12| GND OE |10 11| Y ``````````

Functional Features

• Buffering: The IC acts as a buffer, amplifying and maintaining the input signals at the output.
• Line driving: It provides sufficient current to drive signals across long distances or multiple devices.
• 3-state outputs: The 74ACT244TTR supports three output states - high impedance, logic high, and logic low - allowing for bus sharing and preventing signal conflicts.
• Noise reduction: The IC helps in reducing noise interference during signal transmission.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data transfer.
• Non-inverting buffer maintains signal integrity.
• 3-state outputs allow for bus sharing without interference.
• Wide operating voltage range enhances compatibility.
• Low power consumption promotes energy efficiency.

Disadvantages

• Limited output current capacity may restrict certain applications requiring higher current levels.
• Sensitive to electrostatic discharge (ESD), necessitating proper handling precautions.

Working Principles

The 74ACT244TTR operates by receiving digital input signals on its input pins (A1-A7) and buffering them to the corresponding output pins (Y1-Y7). The non-inverting nature of the buffer ensures that the output state replicates the input state. The 3-state outputs enable multiple devices to share a common bus without signal conflicts.

Application Field Plans

The 74ACT244TTR finds applications in various digital systems, including but not limited to: - Microprocessor-based systems - Data communication networks - Memory interfaces - Industrial automation systems - Automotive electronics - Consumer electronics

Alternative Models

Some alternative models that offer similar functionality to the 74ACT244TTR include: - SN74ACT244N by Texas Instruments - MC74ACT244DW by ON Semiconductor - CD74ACT244E by Texas Instruments - 74ACT244SCX by Fairchild Semiconductor

These alternatives can be considered based on specific requirements and availability.

In conclusion, the 74ACT244TTR is a high-speed octal buffer/line driver IC used for signal buffering and line driving applications in digital electronic systems. Its non-inverting nature, 3-state outputs, and wide operating voltage range make it suitable for various digital logic designs. While it has advantages such as high-speed operation and low power consumption, it also has limitations in terms of output current capacity