Encyclopedia Entry: 74AHCT125D,112

Product Overview

Category

The 74AHCT125D,112 belongs to the category of integrated circuits (ICs) and specifically falls under the family of logic gates.

Use

This product is commonly used in digital electronics for signal amplification and level shifting purposes. It acts as a quad buffer/line driver with 3-state outputs.

Characteristics

• Quad buffer/line driver
• 3-state outputs
• High-speed CMOS technology
• Wide operating voltage range: 2 V to 5.5 V
• Low power consumption
• Schmitt-trigger action on all inputs
• Balanced propagation delays
• Symmetrical output impedance

Package

The 74AHCT125D,112 is available in a standard SOIC (Small Outline Integrated Circuit) package. The package dimensions are 3.9 mm x 4.9 mm x 1.25 mm.

Essence

The essence of this product lies in its ability to provide buffering and line driving capabilities, ensuring reliable signal transmission between different components of a digital circuit.

Packaging/Quantity

The 74AHCT125D,112 is typically packaged in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 2 V to 5.5 V
• Input Voltage Range: 0 V to VCC
• Output Voltage Range: 0 V to VCC
• Operating Temperature Range: -40°C to +125°C
• Maximum Quiescent Supply Current: 4 mA
• Maximum Propagation Delay: 10 ns
• Maximum Output Current: ±8 mA

Detailed Pin Configuration

The 74AHCT125D,112 has a total of 14 pins, which are assigned specific functions as follows:

1. Pin 1: Input 1 (A1)
2. Pin 2: Output 1 (Y1)
3. Pin 3: Input 2 (A2)
4. Pin 4: Output 2 (Y2)
5. Pin 5: GND (Ground)
6. Pin 6: Input 3 (A3)
7. Pin 7: Output 3 (Y3)
8. Pin 8: VCC (Positive Power Supply)
9. Pin 9: Input 4 (A4)
10. Pin 10: Output 4 (Y4)
11. Pin 11: Enable (G)
12. Pin 12: NC (No Connection)
13. Pin 13: NC (No Connection)
14. Pin 14: GND (Ground)

Functional Features

• Quad buffering: The 74AHCT125D,112 can buffer up to four input signals and provide corresponding output signals.
• Line driving: It is capable of driving signals over longer distances without significant degradation.
• 3-state outputs: The outputs can be put into a high-impedance state, allowing multiple devices to share the same bus lines.

Advantages and Disadvantages

Advantages

• High-speed operation due to CMOS technology
• Wide operating voltage range enables compatibility with various digital systems
• Low power consumption for energy-efficient designs
• Schmitt-trigger action on inputs provides noise immunity
• Balanced propagation delays ensure accurate signal timing
• Symmetrical output impedance simplifies circuit design

Disadvantages

• Limited output current capacity may restrict use in certain applications requiring higher drive capabilities
• Not suitable for analog signal processing due to its digital nature

Working Principles

The 74AHCT125D,112 operates based on the principles of CMOS logic. It utilizes a combination of MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) to amplify and switch digital signals. The inputs are buffered and the outputs are driven by internal circuitry, ensuring proper signal levels and compatibility between different logic families.

Detailed Application Field Plans

The 74AHCT125D,112 finds applications in various fields where signal buffering, level shifting, and line driving are required. Some specific application areas include:

1. Microcontroller interfacing: It can be used to interface microcontrollers with other digital devices, ensuring reliable communication.
2. Data transmission systems: The 74AHCT125D,112 helps in transmitting digital data over long distances without significant loss or distortion.
3. Industrial automation: It plays a vital role in controlling and monitoring digital signals in industrial automation systems.
4. Communication equipment: This IC is utilized in communication devices such as routers, switches, and modems for signal conditioning and amplification.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74AHCT125D,112 are:

1. SN74LVC125A: Quad buffer/line driver with 3-state outputs, compatible with a wide range of