Encyclopedia Entry: 74VHC240N

Product Overview

Category

The 74VHC240N belongs to the category of integrated circuits (ICs) and specifically falls under the family of VHC logic gates.

Use

This IC is commonly used in digital electronics for signal amplification, buffering, and level shifting purposes. It serves as a non-inverting octal buffer/line driver with 3-state outputs.

Characteristics

• Voltage Compatibility: The 74VHC240N operates at a voltage range of 2.0V to 5.5V, making it suitable for various applications.
• High-Speed Operation: It offers high-speed performance with propagation delays as low as 4.3 ns.
• Output Current: The IC can source or sink up to 8 mA of current per output pin.
• 3-State Outputs: The 74VHC240N features 3-state outputs, allowing multiple devices to share a common bus without interference.

Package and Quantity

The 74VHC240N is available in a 20-pin DIP (Dual Inline Package) format. It is typically sold in reels or tubes containing multiple units, with quantities varying based on the supplier.

Specifications

• Supply Voltage Range: 2.0V to 5.5V
• Input Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Propagation Delay: 4.3 ns
• Output Current: ±8 mA
• Input Capacitance: 3 pF
• Output Capacitance: 6 pF

Pin Configuration

The 74VHC240N has a total of 20 pins, each serving a specific function. The detailed pin configuration is as follows:

1. A1
2. Y1
3. A2
4. Y2
5. A3
6. Y3
7. A4
8. Y4
9. GND (Ground)
10. Y5
11. A5
12. Y6
13. A6
14. Y7
15. A7
16. Y8
17. OE (Output Enable)
18. VCC (Supply Voltage)
19. B1
20. B2

Functional Features

• Non-Inverting Buffer: The 74VHC240N provides non-inverting buffer functionality, ensuring that the output signal matches the input signal.
• 3-State Outputs: The IC offers 3-state outputs, allowing for high impedance when disabled, preventing any interference on the shared bus.
• High-Speed Operation: With low propagation delays, the IC enables fast signal transmission and processing.

Advantages

• Wide Voltage Compatibility: The 74VHC240N can operate within a broad voltage range, making it versatile for various applications.
• High-Speed Performance: Its low propagation delay ensures efficient signal processing in time-critical scenarios.
• 3-State Outputs: The 3-state outputs enable effective bus sharing without signal interference.

Disadvantages

• Power Consumption: The IC may consume relatively higher power compared to some low-power alternatives.
• Limited Output Current: The maximum output current of ±8 mA per pin may restrict its use in certain high-current applications.

Working Principles

The 74VHC240N operates based on CMOS (Complementary Metal-Oxide-Semiconductor) technology. It utilizes MOSFET transistors to amplify and buffer digital signals, providing non-inverted outputs. The 3-state outputs allow the IC to be effectively connected to a shared bus, enabling multiple devices to communicate without signal conflicts.

Application Field Plans

The 74VHC240N finds extensive application in various digital systems, including: - Microcontrollers and microprocessors - Memory interfacing - Data communication systems - Industrial automation - Automotive electronics

Alternative Models

For those seeking alternatives to the 74VHC240N, several similar ICs are available in the market. Some notable alternatives include: - SN74LV244A: Low-voltage octal buffer/line driver with 3-state outputs. - CD74HCT240: High-speed CMOS octal buffer/line driver with 3-state outputs. - MC74VHC240: Octal buffer/line driver with 3-state outputs.

These alternative models offer comparable functionality and can be considered based on specific project requirements.

In conclusion, the 74VHC240N is a versatile integrated circuit used for signal amplification and buffering in digital electronics. Its high-speed operation, wide voltage compatibility, and 3-state outputs make it suitable for various applications across different industries.

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