Encyclopedia Entry: 74AC244MTC

Product Overview

Category

The 74AC244MTC belongs to the category of integrated circuits (ICs) and specifically falls under the family of digital logic devices.

Use

This IC is commonly used for signal buffering and line driving applications in various electronic systems.

Characteristics

• The 74AC244MTC 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 provides non-inverting outputs and has a symmetrical output impedance.

Package and Quantity

The 74AC244MTC is available in a small outline surface mount package (TSSOP-20). It is typically sold in reels or tubes containing multiple units.

Essence

The essence of the 74AC244MTC lies in its ability to amplify and drive signals while maintaining compatibility with different logic families.

Packaging/Quantity

The 74AC244MTC is commonly packaged in reels or tubes, with each reel/tube containing a specific quantity of IC units. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Supply Voltage Range: 2V to 6V
• High-Level Input Voltage: 2V to VCC
• Low-Level Input Voltage: GND to 0.8V
• High-Level Output Voltage: VCC - 0.5V
• Low-Level Output Voltage: 0.5V
• Maximum Operating Frequency: 125 MHz
• Propagation Delay Time: 4.5 ns (max)
• Output Current: ±24 mA

Detailed Pin Configuration

The 74AC244MTC has a total of 20 pins, which are assigned specific functions as follows:

1. Pin 1: Output Enable (OE)
2. Pin 2: Input/Output (IO1)
3. Pin 3: Input/Output (IO2)
4. Pin 4: Input/Output (IO3)
5. Pin 5: Input/Output (IO4)
6. Pin 6: Input/Output (IO5)
7. Pin 7: Input/Output (IO6)
8. Pin 8: Ground (GND)
9. Pin 9: Input/Output (IO7)
10. Pin 10: Input/Output (IO8)
11. Pin 11: Output (Y1)
12. Pin 12: Output (Y2)
13. Pin 13: Output (Y3)
14. Pin 14: Output (Y4)
15. Pin 15: Output (Y5)
16. Pin 16: Output (Y6)
17. Pin 17: Output (Y7)
18. Pin 18: Output (Y8)
19. Pin 19: VCC
20. Pin 20: Output Enable (OE)

Functional Features

• The 74AC244MTC provides eight non-inverting buffer/line driver channels.
• It offers 3-state outputs, allowing multiple devices to share a common bus.
• The IC has an output enable input (OE) that controls the state of the outputs.
• It operates at high speeds and can handle large signal swings.

Advantages and Disadvantages

Advantages

• Wide voltage range compatibility makes it suitable for various applications.
• High-speed operation enables efficient signal buffering.
• Low power consumption helps conserve energy.
• Symmetrical output impedance ensures balanced signal transmission.
• 3-state outputs allow for bus sharing and system flexibility.

Disadvantages

• Limited maximum operating frequency compared to some other ICs.
• May not be suitable for applications requiring extremely high-speed signal processing.

Working Principles

The 74AC244MTC operates by receiving input signals and amplifying them to drive corresponding output lines. The output enable (OE) input controls the state of the outputs, allowing them to be either active or in a high-impedance state. When the OE input is low, the outputs are enabled and actively driven. Conversely, when the OE input is high, the outputs enter a high-impedance state, effectively disconnecting them from the system.

Detailed Application Field Plans

The 74AC244MTC finds applications in various electronic systems, including but not limited to: 1. Microprocessor-based systems 2. Data communication systems 3. Industrial automation equipment 4. Automotive electronics 5. Consumer electronics 6. Test and measurement instruments

Alternative Models

Several alternative models with similar functionality to the 74AC244MTC include: - 74HC244: A CMOS logic version with comparable characteristics. - SN74LS244: A TTL logic version with different voltage requirements. - CD74