Encyclopedia Entry: 74AC240PC

Product Overview

Category

The 74AC240PC belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital electronic circuits for signal amplification, buffering, and switching purposes.

Characteristics

• The 74AC240PC is a high-speed octal buffer/line driver with 3-state outputs.
• It operates on a wide voltage range, typically between 2V and 6V.
• This IC offers low power consumption and high noise immunity.
• It has a maximum propagation delay of 8.5 nanoseconds.

Package

The 74AC240PC is available in a 20-pin plastic dual in-line package (DIP).

Essence

The essence of the 74AC240PC lies in its ability to provide efficient signal buffering and driving capabilities in digital circuits.

Packaging/Quantity

This IC is typically sold in reels or tubes containing multiple units, with each reel/tube containing a specific quantity (e.g., 25 units per reel).

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 125 MHz
• Maximum Propagation Delay: 8.5 ns
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74AC240PC has a total of 20 pins, numbered as follows:

1. A1
2. Y1
3. A2
4. Y2
5. A3
6. Y3
7. A4
8. GND
9. Y4
10. OE
11. Y5
12. A5
13. Y6
14. A6
15. Y7
16. A7
17. VCC
18. Y8
19. GND
20. A8

Functional Features

• Octal buffer/line driver with 3-state outputs.
• Provides non-inverting buffering and driving of digital signals.
• Enables bidirectional communication between different sections of a circuit.
• Allows for the connection of multiple devices to a common bus.

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient signal processing.
• Low power consumption helps in reducing overall energy usage.
• Wide voltage range compatibility enhances versatility.
• 3-state outputs enable effective bus sharing and control.

Disadvantages

• Limited output current capacity may restrict certain applications.
• Propagation delay can affect real-time signal synchronization.
• Sensitivity to electrostatic discharge (ESD) requires proper handling precautions.

Working Principles

The 74AC240PC operates by receiving input signals on its eight data input pins (A1-A8). These signals are then buffered and amplified before being transmitted to the corresponding output pins (Y1-Y8). The Output Enable (OE) pin controls the activation or deactivation of the outputs. When the OE pin is high, the outputs are enabled, allowing the buffered signals to pass through. Conversely, when the OE pin is low, the outputs are disabled, resulting in a high-impedance state.

Detailed Application Field Plans

The 74AC240PC finds extensive use in various digital electronic applications, including but not limited to: - Microprocessor-based systems - Data communication networks - Memory interfacing circuits - Industrial automation systems - Control systems - Audio/video equipment

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74AC240PC include: - 74HC240: A CMOS version with comparable characteristics. - 74LS240: A low-power TTL version with slightly different specifications. - SN74AC240: A similar IC from Texas Instruments.

These alternative models can be considered based on specific project requirements and availability.

---

Word count: 511 words