CD74HCT244M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Buffer/Line Driver
• Characteristics: High-Speed, CMOS Logic, Octal Bus Buffer
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The CD74HCT244M is an octal bus buffer that provides high-speed, non-inverting buffering for a wide range of digital applications.
• Packaging/Quantity: The CD74HCT244M is typically available in reels or tubes, with a quantity of 250 or 2000 units per reel/tube.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HCT (High-Speed CMOS)
• Number of Buffers: 8
• Input/Output Compatibility: TTL, CMOS
• Propagation Delay: 9 ns (typical)
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOIC-20

Pin Configuration

The CD74HCT244M has a total of 20 pins, which are assigned as follows:

1. GND (Ground)
2. A1 (Input/Output)
3. B1 (Input/Output)
4. Y1 (Output)
5. A2 (Input/Output)
6. B2 (Input/Output)
7. Y2 (Output)
8. A3 (Input/Output)
9. B3 (Input/Output)
10. Y3 (Output)
11. A4 (Input/Output)
12. B4 (Input/Output)
13. Y4 (Output)
14. VCC (Positive Power Supply)
15. OE (Output Enable)
16. Y5 (Output)
17. A5 (Input/Output)
18. B5 (Input/Output)
19. Y6 (Output)
20. GND (Ground)

Functional Features

• The CD74HCT244M provides non-inverting buffering for digital signals.
• It operates at high-speed, making it suitable for time-critical applications.
• The octal bus buffer design allows for easy interfacing between different logic families.
• The output enable (OE) pin allows for tri-state operation, enabling multiple devices to share a common bus.

Advantages and Disadvantages

Advantages: - High-speed operation - Wide supply voltage range - Compatibility with TTL and CMOS logic levels - Tri-state output capability

Disadvantages: - Limited number of buffers (8 in total) - Not suitable for applications requiring higher current drive capabilities

Working Principles

The CD74HCT244M operates based on the principles of CMOS logic. It uses a combination of MOSFET transistors to achieve high-speed, low-power buffering of digital signals. The input signals are amplified and inverted by the internal circuitry, providing a non-inverted output signal.

Detailed Application Field Plans

The CD74HCT244M is commonly used in various digital applications, including:

1. Microprocessor/Controller Interfacing: It facilitates communication between microprocessors/controllers and peripheral devices by buffering the data/address lines.
2. Memory Systems: It can be used to interface memory modules with the memory controller, ensuring reliable data transfer.
3. Communication Systems: It enables signal buffering and level shifting in communication interfaces such as UART, SPI, and I2C.
4. Industrial Automation: It plays a crucial role in connecting sensors, actuators, and control systems, ensuring proper signal transmission.

Detailed and Complete Alternative Models

1. SN74HCT244: Similar octal bus buffer IC from Texas Instruments.
2. MC74HCT244: Octal bus buffer IC from ON Semiconductor.
3. 74HCT244: Generic octal bus buffer IC available from various manufacturers.

These alternative models offer similar functionality and can be used as replacements for the CD74HCT244M in most applications.

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