CD74HC240E

Product Overview

• Category: Integrated Circuit
• Use: Logic Gate Buffer/Driver
• Characteristics: High-Speed, Octal Bus Buffer/Line Driver
• Package: 20-pin DIP (Dual In-Line Package)
• Essence: The CD74HC240E is a high-speed octal bus buffer/line driver designed to provide improved performance over the standard HC240 devices. It is compatible with TTL inputs and can be used as a logic gate buffer/driver in various applications.
• Packaging/Quantity: Available in tubes or reels, with a quantity of 25 pieces per tube/reel.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 9 ns (typical)
• Output Current: ±6 mA
• Input Capacitance: 3.5 pF
• Output Capacitance: 8 pF

Pin Configuration

The CD74HC240E has a total of 20 pins, which are assigned specific functions as follows:

1. GND: Ground
2. A1: Input A1
3. B1: Input B1
4. Y1: Output Y1
5. A2: Input A2
6. B2: Input B2
7. Y2: Output Y2
8. A3: Input A3
9. B3: Input B3
10. Y3: Output Y3
11. A4: Input A4
12. B4: Input B4
13. Y4: Output Y4
14. GND: Ground
15. Y5: Output Y5
16. B5: Input B5
17. A5: Input A5
18. Y6: Output Y6
19. B6: Input B6
20. A6: Input A6

Functional Features

• High-Speed Operation: The CD74HC240E is designed for high-speed logic gate buffering and line driving applications, making it suitable for use in systems that require fast data transfer.
• TTL Compatibility: It is compatible with TTL inputs, allowing seamless integration with existing TTL-based circuits.
• Octal Buffer/Driver: With eight input/output channels, the CD74HC240E provides a convenient solution for buffering and driving multiple signals simultaneously.
• Low Power Consumption: The device operates at low power levels, ensuring efficient energy usage.

Advantages and Disadvantages

Advantages: - High-speed operation enables fast data transfer. - TTL compatibility allows easy integration with existing circuits. - Octal buffer/driver provides multiple input/output channels. - Low power consumption ensures efficient energy usage.

Disadvantages: - Limited voltage range (2V to 6V) may restrict certain applications. - Propagation delay of 9 ns (typical) may not be suitable for ultra-high-speed applications.

Working Principles

The CD74HC240E functions as an octal bus buffer/line driver by receiving input signals from the A1-A6 and B1-B6 pins and providing corresponding output signals on the Y1-Y6 pins. It operates based on the principles of digital logic gates, using transistors and other electronic components to amplify and drive the input signals to the output pins.

Detailed Application Field Plans

The CD74HC240E can be used in various applications, including but not limited to:

1. Data Communication Systems: It can be employed in data communication systems to buffer and drive signals between different components, ensuring reliable data transfer.
2. Microcontroller Interfacing: The CD74HC240E can be used to interface microcontrollers with other devices, such as sensors or actuators, providing signal buffering and driving capabilities.
3. Memory Addressing: In memory systems, it can be utilized for address bus buffering and driving, enabling efficient communication between the memory module and the processor.
4. Industrial Automation: The device can find applications in industrial automation systems, where it can be used for signal buffering and driving in control circuits.

Detailed and Complete Alternative Models

1. SN74HC240N: This is an alternative model from Texas Instruments that offers similar functionality to the CD74HC240E. It comes in a 20-pin DIP package and operates at a supply voltage range of 2V to 6V.
2. MC74HC240AN: Manufactured by ON Semiconductor, this alternative model is also an octal bus buffer/line driver. It features TTL compatibility and operates at a supply voltage range of 2V to 6V.

These alternative models provide similar characteristics and can