Encyclopedia Entry: 74FCT240ATQG8

Product Overview

Category

The 74FCT240ATQG8 belongs to the category of integrated circuits (ICs) and specifically falls under the family of octal buffers/line drivers.

Use

This IC is primarily used for signal buffering and line driving applications in digital systems. It provides a high-speed, non-inverting buffer function with 3-state outputs.

Characteristics

• High-speed operation: The 74FCT240ATQG8 offers fast propagation delays, making it suitable for time-critical applications.
• 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.

Package and Quantity

The 74FCT240ATQG8 is available in a small-outline integrated circuit (SOIC) package. It consists of 20 pins and is surface mountable. The product is typically sold in reels or tubes containing multiple units.

Essence

The essence of the 74FCT240ATQG8 lies in its ability to provide efficient signal buffering and line driving capabilities, enabling reliable communication between different components within a digital system.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Propagation Delay: 6ns
• Maximum Output Current: ±24mA

Pin Configuration

The 74FCT240ATQG8 features a 20-pin configuration as follows:

+---\/---+ A1 |1 20| VCC A2 |2 19| B1 A3 |3 18| B2 A4 |4 17| B3 A5 |5 16| B4 A6 |6 15| B5 A7 |7 14| B6 A8 |8 13| B7 GND |9 12| B8 OE# |10 11| Y1 +--------+

Functional Features

• Non-inverting Buffer: The IC ensures that the output signal matches the input signal, maintaining signal integrity.
• 3-State Outputs: The 74FCT240ATQG8 supports three output states - high impedance, logic high, and logic low. This allows multiple devices to share a common bus without interfering with each other.
• High-Speed Operation: With a maximum propagation delay of 6ns, this IC is suitable for time-critical applications.

Advantages and Disadvantages

Advantages

• Fast operation enables efficient data transfer in time-sensitive applications.
• Non-inverting buffer preserves signal integrity.
• 3-state outputs facilitate bus sharing among multiple devices.

Disadvantages

• Limited voltage range (4.5V to 5.5V) may not be compatible with all systems.
• Requires careful consideration of power supply and grounding to avoid noise interference.

Working Principles

The 74FCT240ATQG8 operates by receiving an input signal and buffering it to the output. It utilizes non-inverting buffers, ensuring that the output signal matches the input signal. The IC also features 3-state outputs, allowing it to drive a bus shared by multiple devices without causing conflicts.

Application Field Plans

The 74FCT240ATQG8 finds applications in various digital systems, including but not limited to: - Microprocessors and microcontrollers - Memory systems - Communication interfaces - Data acquisition systems - Industrial automation

Alternative Models

For similar functionality, the following alternative models can be considered: - 74HC240: A CMOS octal buffer/line driver with 3-state outputs. - SN74LS240: A TTL octal buffer/line driver with 3-state outputs. - CD74ACT240: An advanced CMOS octal buffer/line driver with 3-state outputs.

These alternatives provide comparable features and can be used as substitutes for the 74FCT240ATQG8 in various applications.

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